a) The melting point of sodium in Celsius is 118 °C and in Fahrenheit is 244 °F. b) Assuming ideal gas behavior, the number of moles of air in the room remains constant when the temperature rises by 5 K and the pressure remains constant.
(a) To convert from Kelvin (K) to Celsius (°C), we subtract 273.15 from the temperature in Kelvin. Therefore, the melting point of sodium in Celsius is 391 K - 273.15 = 117.85 °C. To convert from Celsius to Fahrenheit, we use the formula F = (C × 9/5) + 32.
Thus, the melting point of sodium in Fahrenheit is (117.85 × 9/5) + 32 = 244.13 °F. Rounding to the nearest whole number, the melting point of sodium in Celsius is 118 °C and in Fahrenheit is 244 °F.
(b) According to the ideal gas law, PV = nRT, the pressure is P, volume is V, number of moles is n, ideal gas constant is R, and temperature in Kelvin is T. As the pressure and volume remain constant, we can rewrite the ideal gas law as n = (PV) / (RT).
No matter how the temperature changes, the number of moles of air in the space remains constant since the pressure and volume are both constant. Therefore, when the temperature rises by 5 K, no moles of air have left the room.
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:If we can't build a telescope on Earth to image the Apollo footprints, let's solve the problem by putting a telescope in orbit around the Moon instead. By being in the vacuum of space, our lunar satellite will avoid all the problems of astronomical seeing and will actually be able to achieve its theoretical diffraction limit. By being so much closer to the Moon, the footprints themselves will be much, much larger in angular size, allowing us to resolve them with a much, much smaller telescope mirror. So, let's imagine you place a telescope in an orbit that is d=50.0km above the surface of the Moon, such that as it passes directly overhead of the Apollo landing sites, it can record images from that distance. [This is the actual distance that the Lunar Reconnaissance Orbiter satellite orbits above the Moon's surface.] Following the work in Part II, calculate the angular size of the footprints from this new, much closer distance. The length units must match, so use the fact that 1.00 km=1.00×103 m to convert the orbital radius/viewing distance, d=50.0 km, from kilometers to meters: d=( km)×[ /. ]=
The angular size of the footprints from the new, much closer distance of 50.0 km above the surface of the Moon is 4 × 10¹⁰.
Given data:
Orbital radius/viewing distance, d = 50.0 km = 50.0 × 10³ m
To convert the orbital radius/viewing distance from kilometers to meters, we use the conversion factor:
1 km = 1 × 10³ m
Thus, d = 50.0 × 10³ m
The formula for calculating the angular size of footprints is given below:
θ = d / D
Where,
θ = Angular size of footprints.
d = Distance of telescope from the footprints.
D = Length of the footprints.
The Lunar Reconnaissance Orbiter satellite orbits 50 km above the surface of the Moon. So, the distance of the telescope from the footprints is d = 50.0 × 10³ m.
From Part II, the length of the footprints is D = 1.25 × 10⁻³ m.
Using the above formula, we can calculate the angular size of footprints as:
θ = d / D
θ = (50.0 × 10³) / (1.25 × 10⁻³)
θ = (50.0 × 10³) × (10³ / 1.25)
θ = (50.0 × 10³) × (8 × 10²)
θ = 4 × 10¹⁰
Therefore, the angular size of footprints from this new, much closer distance is 4 × 10¹⁰.
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Tarzan, who has a mass of 75 kg, holds onto the end of a vine that is at a 13 ∘ angle from the vertical. He steps off his branch and, just at the bottom of his swing, he grabs onto his chimp friend Cheetah, whose mass is 45 kg.
What is the maximum angle the rope reaches as tarzan swings to the other side? Express your answer in degrees.
The calculated angle, 9.6°, represents the requested maximum angle.
To find the maximum angle the rope reaches as Tarzan swings to the other side, we can use the conservation of energy and momentum principles.
Let m be the mass of Tarzan (75 kg), m' be the mass of his friend Cheetah (45 kg), L be the length of the vine, and i be the initial angle of the vine with the vertical (13°).
The initial height from where Tarzan steps off the vine is given by [tex]\rm \( h_i = L - L \cos(i) \)[/tex].
Using the conservation of energy from the top to the bottom of the swing, Tarzan's initial speed [tex]\rm (\( v_i \))[/tex] is found to be [tex]\rm \( v_i = \sqrt{2g(L - L \cos(i))} \)[/tex].
After grabbing Cheetah, the final angle f and the final height [tex]\rm (\( h_f \))[/tex] are related by [tex]\rm \( h_f = L - L \cos(f) \)[/tex].
Applying conservation of energy from the bottom back to the top, Tarzan's final speed [tex]\rm (\( v_f \))[/tex] is found to be [tex]\rm \( v_f = \sqrt{2g(L - L \cos(f))} \)[/tex].
Conservation of momentum at the bottom gives [tex]\rm \( m v_i = (m + m') v_f \)[/tex], which can be rearranged to find the angle f.
Solving these equations yields f = 9.6° as the maximum angle the rope reaches.
The calculated angle, 9.6°, represents the requested maximum angle.
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The orbit of a planet is a very squished ellipse. Its eccentricity is closest to
a) unknown
b) 0
c) 1
The orbit of a planet is a very squished ellipse. Its eccentricity is closest to b) 0. An ellipse is a shape that is not a perfect circle. An ellipse has two foci instead of one, and a planet orbits one of the foci.
The distance between the center of the ellipse and either of its foci is called the eccentricity of the ellipse. It ranges between 0 and 1. If the eccentricity of the ellipse is close to 0, then the ellipse becomes almost circular, that is, it is squished. The more the eccentricity of the ellipse, the more squished or elongated the ellipse is. Therefore, option b) 0 is the answer.
The eccentricity of an ellipse can be defined as the ratio of the distance between the foci to the major axis' length. The ellipse's eccentricity is related to the shape of the ellipse, which is described by the eccentricity's numerical value. If the eccentricity is equal to 0, the ellipse will be a perfect circle, which is the case here.
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The hot resistance of a flashlight bulb is 2.80Ω, and it is run by a 1.58 V alkaline cell having a 0.100Ω internal resistance. (a) What current (in A) flows? ___________ A (b) Calculate the power (in W) supplied to the bulb using I²Rbulb.
_________ W (c) Is this power the same as calculated using V2/Rbulb (where V is the voltage drop across the bulb)? O No O Yes
(a) The current flowing through the circuit is 0.518 A.
(b) The power supplied to the bulb is 0.746 W.
(c) No, this power is not the same as the power calculated using I²Rbulb
The hot resistance of a flashlight bulb is 2.80Ω,
Voltage is 1.58 V
Internal resistance is 0.100Ω .
(a) The current flowing through the circuit is given by:
I = (V - Ir) / R
where
V is the voltage of the cell,
Ir is the internal resistance of the cell and
R is the resistance of the bulb.
I = (1.58 - 0.1) / 2.8I
= 0.518 A
The current flowing through the circuit is 0.518 A.
(b) The power supplied to the bulb can be calculated as
P = I²R
= 0.518² × 2.8P
= 0.746 W
The power supplied to the bulb is 0.746 W.
(c) The voltage drop across the bulb is given by:
V = IR
V = 0.518 × 2.8
V = 1.4544 V
The power supplied to the bulb can also be calculated as:
P = V² / R
P = (1.4544)² / 2.8
P = 0.753 W
No, this power is not the same as the power calculated using I²Rbulb. It's because of the difference in the voltage across the bulb due to the internal resistance of the cell.
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2. Please use frequency response analysis to prove that 1st order transfer function GoL(s) in a closed-loop control system is a stable system but after a dead time is " included in the system (Go(s) =
Therefore, the inclusion of a dead time in a closed-loop control system's transfer function results in an unstable system.
Frequency Response Analysis: Frequency response analysis is the graphical representation of the magnitude and phase angle of the output response concerning frequency. A frequency response analysis of a closed-loop control system's transfer function is used to determine the stability of the system. A 1st order transfer function, GoL(s), is a stable system in a closed-loop control system. If a dead time is included in the system, the system's transfer function becomes Go(s) as a result. A dead time is the amount of time it takes for the system to respond after a signal has been sent. Frequency response analysis can be used to prove that the closed-loop control system's transfer function is stable with a 1st order transfer function. As a result, the transfer function for a 1st order system is given as follows: GoL(s) = K / (1+ τs)where K is the gain of the system, τ is the time constant, and s is the Laplace variable. After adding a dead time into the system, the transfer function changes to Go(s).When a dead time is added to the system, the transfer function changes to:Go(s) = Ke^(-Ls) / (1+ τs)where L is the dead time. The frequency response analysis of the transfer function Go(s) indicates that the system is unstable since the phase shift approaches -180 degrees as the gain approaches infinity. Therefore, the inclusion of a dead time in a closed-loop control system's transfer function results in an unstable system.
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explore the relationship of Lenz law to Newton's 3rd law of
motion, energy conservation , and the 2nd law of
thermodynamics.
Lenz's law, Newton's third law of motion, energy conservation, and the second law of thermodynamics are all interconnected principles that govern different aspects of physical phenomena.
Lenz's law is a consequence of electromagnetic induction and states that the direction of an induced electromotive force (emf) in a circuit is such that it opposes the change in magnetic flux that produced it. This law is directly related to Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. In the case of electromagnetic induction, the changing magnetic field induces a current in the circuit, and the induced current creates a magnetic field that opposes the change in the original magnetic field. Energy conservation is a fundamental principle that states that energy cannot be created or destroyed, only transformed from one form to another. In the context of Lenz's law, when a current is induced in a circuit, energy is converted from the original source (such as mechanical energy or magnetic energy) to electrical energy. This conservation of energy is a fundamental principle that holds true in all physical processes.
The second law of thermodynamics, specifically the law of entropy, states that in an isolated system, the total entropy (a measure of disorder) tends to increase over time. Lenz's law, by opposing the change in magnetic flux, ensures that the induced currents generate magnetic fields that tend to reduce the change in the original magnetic field. This reduction in change implies a reduction in disorder and an increase in order, which aligns with the second law of thermodynamics.
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How much energy does it take to A bar of material has a volume of 13cc heat up 600 cm 3
of water (C water
= and a temperature of 40 ∘
C. If the 4186 kgK
J
,L v, water
=2256 kg
kJ
,rho= biggest the material can get is 13.5cc, 1000 m 3
kg
, molar mass =18 mol
g
) from then what is its coefficient of linear 293 K to 313 K ? expansion? The material melts at a temperature of 230 ∘
C.
The energy required to heat up 600 cm^3 of water from 40 °C to 313 K is calculated to be approximately 12,558,000 J.
The coefficient of linear expansion of the material is found to be approximately 0.001923, indicating how much it expands per unit length when subjected to a temperature change from 293 K to 313 K.
Step 1: Calculate the energy required to heat up the water.
Specific heat capacity of water (C_water) = 4186 kgKJ
Mass of water (m_water) = 600 cm^3 = 600 g
Initial temperature of water (T_initial) = 40 °C
Final temperature of water (T_final) = 313 K (approximately 40 °C)
We can use the formula:
Energy = m_water * C_water * (T_final - T_initial)
Substituting the given values:
Energy = 600 g * 4186 kgKJ * (313 K - 293 K)
Energy = 600 g * 4186 kgKJ * 20 K
Calculating the energy:
Energy = 12,558,000 J
Step 2: Calculate the change in volume of the material.
Initial volume of the material (V_initial) = 13 cc
Final volume of the material (V_final) = 13.5 cc
Change in volume (ΔV) = V_final - V_initial
ΔV = 13.5 cc - 13 cc
ΔV = 0.5 cc
Step 3: Calculate the coefficient of linear expansion.
Change in temperature (ΔT) = T_final - T_initial = 313 K - 293 K = 20 K
Coefficient of linear expansion (α) = ΔV / (V_initial * ΔT)
α = 0.5 cc / (13 cc * 20 K)
α = 0.5 / (13 * 20)
α ≈ 0.001923
Therefore, the energy required to heat up the water is approximately 12,558,000 J. The coefficient of linear expansion of the material is approximately 0.001923, indicating its expansion per unit length when subjected to a temperature change from 293 K to 313 K.
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2) Does a rocket need the Earth, the launch pad, or the Earth's
atmosphere (or more than one of these) to push against to create
the upward net force on it? If yes to any of these, explain your
answer
"yes." Rockets need to push against the Earth's atmosphere to create an upward net force on it. Furthermore, the rocket requires a launch pad to stay in position while building up pressure.
The earth's atmosphere is necessary for the rocket to push against. The gases that make up the atmosphere exert pressure on everything in it, including rockets. For the rocket to move upwards, it needs to create an upward force that is larger than the force of gravity pulling it downwards. This upward force can be created by burning fuel and expelling the gases through the nozzle at the bottom of the rocket. The expelled gases push against the atmosphere, generating an equal and opposite reaction that pushes the rocket upwards.The launch pad is equally crucial as it provides the rocket with a firm base while it builds up pressure. When the rocket engines are ignited, a large amount of energy is released, resulting in a powerful explosion. The rocket needs to be anchored to the ground to avoid being pushed back or toppled over by the force of the blast. It is why launch pads are specially designed with massive concrete and steel structures that keep the rocket in place until it can lift-off safely.
A rocket requires the Earth's atmosphere and a launch pad to push against to create an upward net force. Without these two, the rocket cannot take off or achieve its desired altitude.
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Two charges are placed on the x-axis: a charge of +12.6nC at the origin and a charge of -31.3nC placed at x=24cm. What is the electric field vector on the y-axis at y=31cm?
The electric field vector on the y-axis at y = 31 cm can be calculated by considering the electric field contributions from each charge at their respective positions.
The electric field due to a point charge can be determined using the formula E = kQ/r^2, where E is the electric field, k is Coulomb's constant, Q is the charge, and r is the distance from the charge. To calculate the electric field at y = 31 cm on the y-axis, we need to consider the electric field contributions from both charges. The electric field due to the positive charge at the origin can be calculated using the formula E1 = kQ1/r1^2, where Q1 is the charge (+12.6 nC) and r1 is the distance from the charge (which is the y-coordinate, 31 cm in this case).
Similarly, the electric field due to the negative charge at x = 24 cm can be calculated using the formula E2 = kQ2/r2^2, where Q2 is the charge (-31.3 nC) and r2 is the distance from the charge (which is the distance between the charge and the point on the y-axis, calculated as √(x^2 + y^2)).
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A large tank is filled with water to a depth of 15m. A spout located 10.0 m above the bottom of the tank is then opened. With what speed will water emerge from the spout?
using the Bernoulli's equation
The task is to determine the speed at which water will emerge from a spout located 10.0 m above the bottom of a large tank filled with water to a depth of 15 m. This can be done using Bernoulli's equation, which relates the pressure, velocity, and height of a fluid in a steady flow situation.
Bernoulli's equation states that the sum of the pressure energy, kinetic energy, and gravitational potential energy per unit volume of a fluid remains constant along a streamline in steady flow. In this case, we can consider two points along the streamline: the surface of the water in the tank and the spout.
At the surface of the water in the tank, the pressure is atmospheric pressure, and the velocity and height are both zero. At the spout, the pressure is still atmospheric pressure, but the velocity and height are non-zero. By applying Bernoulli's equation between these two points, we can solve for the velocity of the water at the spout.
The equation can be written as: P + 0.5ρv^2 + ρgh = constant
Since the pressure and height at both points are the same, they cancel out, and the equation simplifies to: 0.5ρv^2 + ρgh = 0.5ρv_0^2, where v_0 is the velocity of the water at the surface of the tank (which is zero).
Rearranging the equation, we get: v = √(2gh), where v is the velocity of the water at the spout, g is the acceleration due to gravity, and h is the height difference between the spout and the surface of the water.
By substituting the given values of h = 10.0 m and using the value of g, we can calculate the speed at which the water will emerge from the spout.
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you watch a person chopping wood and note that after the last chop you hear it 2 seconds later. how far is the chopper?
less than 330m, more than 330m, 330m or no way to tell?
The chopper is 686 meters away from the listener.
When we hear any sound, it means sound waves are coming towards us, and our ears receive those waves. It travels through the air and then reaches to our ears. As sound waves travel through the air, they encounter obstacles that cause their energy to disperse. The speed of sound waves through the air depends on the temperature and the pressure of the air. In general, at room temperature, the speed of sound through the air is approximately 343 meters per second.
The given information can be used to find the distance between the chopper and the listener. To calculate the distance, we can use the following formula:
d = v × t
where, d is the distance, v is the speed of sound (343 m/s at room temperature), and t is the time taken to hear the sound.
We can calculate the distance using the given information: We are given that the sound was heard 2 seconds after the last chop.
Therefore, the time taken to hear the sound is t = 2 seconds.
Using the formula, we have: d = v × td = 343 × 2 = 686 meters.
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A ring of current with radius 5 lies in the xy plane with center at the origin and carries a current of 10 A in the positive direction. A charge equal to 1 C is travelling from the origin at a velocity equal to u=202. what is direction of the force acting on the charge? 0-2 None of the given answers because the force is zero 3 -p O 16
The force acting on the charge will be directed in a direction perpendicular to the xy-plane (out of the plane or in the z-direction), and this corresponds to answer choice 3: -p.
To determine the direction of the force acting on the charge moving through the magnetic field created by the current-carrying ring, we can use the right-hand rule.
The right-hand rule for the force on a moving charge states that if you point your thumb in the direction of the charge's velocity (u), and your fingers in the direction of the magnetic field (due to the current in the ring), then the force will be perpendicular to both the velocity and magnetic field, and will point in the direction your palm faces.
In this case, since the charge is moving from the origin with a velocity u=202, and the current in the ring creates a magnetic field around it, the force acting on the charge will be perpendicular to both the velocity and the magnetic field.
Therefore, the force acting on the charge will be directed in a direction perpendicular to the xy-plane (out of the plane or in the z-direction), and this corresponds to answer choice 3: -p.
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Modified True or False Write T id the statement is truthful. Otherwise, explain why it is false. There is no gravity in space that is why astronauts in the International Space Station experience apparent weightlessness. Your answer Bill pushes his silver bicycle down a road in Derry at a constant velocity. Of the four forces (friction, gravity, normal force, and pushing force) acting on the bicycle, the greatest amount of work is exerted by friction. Your answer The arm of a space shuttle, which carries its payload, suddenly malfunctions and releases the payload. It is expected that the payload will remain in the same orbit with the shuttle.
True: There is gravity in space, but astronauts in the ISS experience weightlessness due to being in a state of freefall.
False: In a constant velocity scenario, the work done by friction is zero.
False: If a space shuttle's arm malfunctions and releases the payload, it will not remain in the same orbit but follow its own trajectory.
1. True: In space, there is gravity present, but astronauts in the International Space Station (ISS) experience apparent weightlessness due to the state of freefall they are in. The ISS is in a constant state of freefall around the Earth, causing the astronauts to feel weightless.
2. False: If Bill is pushing his silver bicycle at a constant velocity, it means there is no acceleration. When there is no acceleration, the net force acting on the bicycle is zero.
In this case, the force of pushing is balanced by the force of friction, resulting in no net work being done by friction. Therefore, the statement is false. The work done by friction would be zero in this scenario.
3. False: If the arm of a space shuttle malfunctions and releases the payload while the shuttle is in orbit, the payload will not remain in the same orbit as the shuttle. Once released, the payload will continue moving with the same velocity it had when it was released.
Since the payload is no longer connected to the shuttle, it will follow its own trajectory, which will likely be slightly different from the shuttle's orbit. The payload will continue to orbit the Earth but not necessarily in the same path as the shuttle. Therefore, the statement is false.
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Fill in the Blanks Type your answers in all of the blanks and submit ⋆⋆ A typical supertanker has a mass of 2.0×10 6
kg and carries oil of mass 4.0×10 6
kg. When empty, 9.0 m of the tanker is submerged in water. What is the minimum water depth needed for it to float when full of oil? Assume the sides of the supertanker are vertical and its bottom is flat. m
The minimum water depth required for a supertanker to float when full of oil is approximately 13.5 meters.
To determine the minimum water depth needed for the supertanker to float when full of oil, we need to consider the concept of buoyancy. According to Archimedes' principle, an object submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid it displaces.
When empty, 9.0 meters of the supertanker is submerged in water. This means that the weight of the water displaced by the empty tanker is equal to the weight of the tanker itself. Therefore, the buoyant force acting on the empty tanker is sufficient to support its weight.
Now, when the tanker is filled with oil, it gains an additional mass of 4.0×10^6 kg. To remain afloat, the buoyant force acting on the tanker must be equal to the combined weight of the tanker and the oil it carries. The buoyant force depends on the volume of water displaced, which in turn depends on the depth to which the tanker sinks.
Since the buoyant force must equal the combined weight of the tanker and the oil, we can set up the equation:
Buoyant force = Weight of tanker + Weight of oil
The weight of the tanker can be calculated as the product of its mass (2.0×10^6 kg) and the acceleration due to gravity (9.8 m/s^2). Similarly, the weight of the oil is the product of its mass (4.0×10^6 kg) and the acceleration due to gravity.
By rearranging the equation and solving for the water depth, we find that the minimum depth required for the tanker to float when full of oil is approximately 13.5 meters.
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In a scanning electron microscope, if we accelerate an electron through an electric potential of 20 kV, what is the electron's kinetic energy? (1 eV-1.6x10J, me = 9.11 x 10kg) (b) What is the velocity of the electron after the acceleration? Do we need to consider its relativistic effect? Briefly justify your answer and support your justification with a calculation. (c) What is the de Broglie wavelength of the electron with the velocity as in (b) (i) = 6,63 % 10*) (d) For an electron as described in (a), what is the minimum possible uncertainty in its position 08) The ontzation ency of the droom is 13.6 V. Ir the new meth hop & 7 00 8 9 O
The electron's kinetic energy is -32 x 10^(-16) J.he de Broglie wavelength of the electron is approximately 1.23 x 10^(-11) m.
(a) To find the electron's kinetic energy, we can use the formula:
Kinetic energy (K.E.) = qV
Where:
q is the charge of the electron
V is the electric potential
Given:
Charge of the electron (q) = -1.6 x 10^(-19) C
Electric potential (V) = 20 kV = 20 x 10^3 V
Substituting the values into the formula:
K.E. = (-1.6 x 10^(-19) C) * (20 x 10^3 V)
K.E. = -32 x 10^(-16) J
Therefore, the electron's kinetic energy is -32 x 10^(-16) J.
(b) To determine the velocity of the electron after acceleration, we can use the formula for kinetic energy:
K.E. = (1/2)mv^2
Where:
m is the mass of the electron
v is the velocity of the electron
Given:
Mass of the electron (m) = 9.11 x 10^(-31) kg
Kinetic energy (K.E.) = -32 x 10^(-16) J
Rearranging the formula:
v^2 = (2K.E.) / m
v = √[(2K.E.) / m]
Substituting the values:
v = √[(2 * (-32 x 10^(-16) J)) / (9.11 x 10^(-31) kg)]
v ≈ 5.92 x 10^7 m/s
To determine if we need to consider the relativistic effect, we can compare the calculated velocity to the speed of light. The speed of light (c) is approximately 3 x 10^8 m/s. Since the velocity of the electron (5.92 x 10^7 m/s) is significantly smaller than the speed of light, we can neglect the relativistic effects for this calculation.
(c) The de Broglie wavelength of the electron can be calculated using the equation:
λ = h / p
Where:
λ is the de Broglie wavelength
h is the Planck's constant (6.63 x 10^(-34) J·s)
p is the momentum
The momentum can be calculated using:
p = mv
Given:
Mass of the electron (m) = 9.11 x 10^(-31) kg
Velocity of the electron (v) = 5.92 x 10^7 m/s
Substituting the values:
p = (9.11 x 10^(-31) kg) * (5.92 x 10^7 m/s)
p ≈ 5.39 x 10^(-23) kg·m/s
Now, substituting the calculated momentum into the de Broglie wavelength equation:
λ = (6.63 x 10^(-34) J·s) / (5.39 x 10^(-23) kg·m/s)
λ ≈ 1.23 x 10^(-11) m
Therefore, the de Broglie wavelength of the electron is approximately 1.23 x 10^(-11) m.
(d) The minimum possible uncertainty in the position of the electron can be determined using the Heisenberg uncertainty principle:
Δx * Δp ≥ h/2
Where:
Δx is the uncertainty in position
Δp is the uncertainty in momentum
h is the Planck's constant (6.63 x 10^(-34) J·s)
Since the electron is accelerated and has a known velocity, its momentum is well
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In a typical electron microscope, the momentum of each electron is about 1.3 x 10⁻²² kg-m/s. What is the de Broglie wavelength of the electrons?
m
In a typical electron microscope, the momentum of each electron is about 1.3 x 10⁻²² kg-m/s. The de Broglie wavelength of the electrons is approximately 5.097 x 10^-12 meters.
To calculate the de Broglie wavelength of electrons, we can use the de Broglie wavelength equation:
λ = h / p
where:
λ is the de Broglie wavelength,
h is the Planck's constant (approximately 6.626 x 10^-34 J·s),
p is the momentum of the electron.
Given:
p = 1.3 x 10^-22 kg·m/s
Substituting the values into the equation:
λ = (6.626 x 10^-34 J·s) / (1.3 x 10^-22 kg·m/s)
Simplifying the equation:
λ = (6.626 x 10^-34 J·s) / (1.3 x 10^-22 kg·m/s)
λ ≈ 5.097 x 10^-12 meters
Therefore, the de Broglie wavelength of the electrons is approximately 5.097 x 10^-12 meters.
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"Experiment 3:Measurement experiment of gas-phase diffusion
coefficient
Q3-1: What is the approximate partial pressure of component A in
the horizontal
section of the nozzle of the diffusion pipe? Why is that"?
The partial pressure of component A in the horizontal section of the nozzle of the diffusion pipe is about 0.3 atm.
Experiment 3: Measurement experiment of gas-phase diffusion coefficientGas-phase diffusion is a process of gas molecules' movement through space. The rate of gas-phase diffusion can be quantified using Fick's Law. The purpose of this experiment is to determine the diffusion coefficient of two components (A and B) in a gas mixture using the separation method.The approximate partial pressure of component A in the horizontal section of the nozzle of the diffusion pipe is about 0.3 atm.
The partial pressure of the component A is proportional to the height of the solution in the tube. When the gas mixture enters the diffusion tube, the component A vapor enters the tube with a partial pressure of 0.3 atm. The vapor phase of component A is transported by the carrier gas to the separation column. After that, the vapor of component A was separated and detected using the method of gas chromatography.
This experiment enables students to identify gas molecules' rates of movement through space. It provides the experience of using sophisticated equipment to measure gas properties and the use of mathematical models to interpret experimental data.In conclusion, the partial pressure of component A in the horizontal section of the nozzle of the diffusion pipe is about 0.3 atm.
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A car is moving across a level highway with a speed of 22.9 m/s. The brakes are applied and the wheels become locked as the 1260-kg car skids to a stop. The braking distance is 126 meters. What is the initial energy of the car? _______ J
What is the final energy of the car? ________J How much work was done by the brakes to stop the car? ________J (make sure you include the correct sign) Determine the magnitude (enter your answer as a positive answer) of the braking force acting upon the car. _________ N
A car is moving across a level highway with a speed of 22.9 m/s. The brakes are applied and the wheels become locked as the 1260-kg car skids to a stop. The braking distance is 126 meters.
Velocity of car, v = 22.9 m/s Mass of car, m = 1260 kg Braking distance, s = 126 m
The initial energy of the car can be calculated as:
Initial Kinetic Energy of the car = 1/2 mv²
Here, m = 1260 kg, v = 22.9 m/s
Putting these values in the above formula: Initial Kinetic Energy = 1/2 × 1260 kg × (22.9 m/s)²= 1/2 × 1260 kg × 524.41 m²/s²= 165748.1 J
The final energy of the car is zero as the car is at rest now. Work done by the brakes to stop the car can be calculated as follows:
Work Done = Change in Kinetic Energy= Final Kinetic Energy - Initial Kinetic Energy
The final kinetic energy of the car is zero. Therefore, Work Done = 0 - 165748.1 J= -165748.1 J (Negative sign indicates the energy is lost by the car during the application of brakes)
The magnitude of the braking force acting upon the car can be calculated using the work-energy principle. The work done by the brakes is equal to the net work done by the forces acting on the car. Therefore,
Work Done by Brakes = Force x Distance
The frictional force acting on the car is equal to the force applied by the brakes. Hence,
Force = Frictional force acting on the car. The work done by the frictional force can be calculated as follows:
Work Done = Frictional force x Distance
Therefore, Frictional force acting on the car = Work Done / Distance= -165748.1 J / 126 m= -1314.6 N (The negative sign indicates that the force acts opposite to the direction of motion of the car. The magnitude of the force is 1314.6 N.)
Therefore, Initial Energy of the car = 165748.1 J
Final Energy of the car = 0 J
Work done by the brakes to stop the car = -165748.1 J
Magnitude of the braking force acting upon the car = 1314.6 N
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The capacitor from the previous problem is carefully removed from the circuit after t=1.5 s in such a way that the charge on each plate is not removed. It's placed in another circuit where it is in series with a 150Ω resistor. (a) What is the current in the circuit the instant it's connected? (b) What is the voltage across the capacitor after .25s? (c) What is the charge on each plate of the capacitor at this time?
After carefully removing the capacitor from its initial circuit and placing it in a new circuit with a 150Ω resistor in series, calculations are needed to determine the current in the circuit at the moment of connection, the voltage across the capacitor after 0.25s
When the capacitor is connected to the new circuit, an instantaneous current will flow. To calculate this current, we can use the formula I = V/R, where V is the initial voltage across the capacitor and R is the resistance in the circuit.
After 0.25s, the voltage across the capacitor can be determined using the formula V = V₀ * exp(-t/RC), where V₀ is the initial voltage across the capacitor, t is the time, R is the resistance, and C is the capacitance.
The charge on each plate of the capacitor can be calculated using the formula Q = CV, where Q is the charge, C is the capacitance, and V is the voltage across the capacitor.
By substituting the given values into the respective formulas, we can determine the current in the circuit at the moment of connection, the voltage across the capacitor after 0.25s, and the charge on each plate of the capacitor at that time.
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Your car's 32.0 W headlight and 2.60 kW starter are ordinarily connected in parallel in a 12.0 V system. What power (in W) would one headlight and the starter consume if connected in series to a 12.0 V battery? (Neglect any other resistance in the circuit and any change in resistance in the two devices. Answer to the nearest 0.1 W.)
The given value of the power of a car's 32.0 W headlight and 2.60 kW starter connected in parallel in a 12.0 V system is to be used to find the power consumed by one headlight and the starter when connected in series to a 12.0 V battery. This is to be calculated without taking any other resistance into account and any change in resistance in the two devices.The power of the car's headlight and starter when connected in parallel is to be found initially.
Since the power of the headlight is given in watts and that of the starter in kilowatts, the latter is to be converted into watts before summing up with the former.
∴ power when connected in parallel = 32.0 W + 2.60 kW × 1000 W/kW = 32.0 W + 2600 W = 2632 W.
When the two devices are connected in series, the total voltage across the two devices = 12 V + 12 V = 24 V.
Let R be the resistance of one headlight. Since the resistance is the same for both devices in the parallel connection, the combined resistance of the two devices = R/2. Let I be the current through each device when connected in series, then
I = 24 V/R.
By the law of conservation of energy, the power of each device when connected in series = 12 V × I. Therefore, the power consumed by one headlight and the starter when connected in series to a 12.0 V battery is given by:
P = 12 V × I = 12 V × 24 V/R = 288 V²/R watts
Hence, the power consumed by one headlight and the starter when connected in series to a 12.0 V battery is 288 V²/R, where R is the resistance of one headlight.
Answer: 691.2 W.
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What maximum current is delivered by an AC source with AVmax = 46.0 V and f = 100.0 Hz when connected across a 3.70-4F capacitor? mA
The maximum current delivered by an AC source with a peak voltage of 46.0 V and a frequency of 100.0 Hz, when connected across a 3.70-4F capacitor, can be calculated. The maximum current is found to be approximately 12.43 mA.
The relationship between the current (I), voltage (V), and capacitance (C) in an AC circuit is given by the formula I = CVω, where ω is the angular frequency. The angular frequency (ω) can be calculated using the formula ω = 2πf, where f is the frequency.
Given that the peak voltage (Vmax) is 46.0 V and the frequency (f) is 100.0 Hz, we can calculate the angular frequency (ω = 2πf) and then substitute the values into the formula I = CVω to find the maximum current (I).
To incorporate the capacitance (C), we need to convert it to Farads. The given capacitance of 3.70-4F can be written as 3.70 × 10^(-4) F.
Substituting the values into the formula I = CVω, we can calculate the maximum current.
After performing the calculations, the maximum current delivered by the AC source across the 3.70-4F capacitor is found to be approximately 12.43 mA.
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A resistor has the following colored stripes: red, red, black, gold. Its resistance is equal to:
a. 220 Ω b. 0.220 Ω c. 2220 Ω d. 22 Ω
A resistor has the following colored stripes: red, red, black, gold. Its resistance is equal to 22 , option d.
A resistor is a circuit element that restricts current flow. Resistance is the resistance of a substance to the flow of electricity. The resistance of a circuit is determined by resistors.
In electrical circuits, resistor color coding is commonly utilized to recognize the resistance of a resistor. A series of colored stripes are used to indicate the resistance of a resistor. A digit or number corresponds to each colored stripe. Here is the code for the colors of the stripes:
Color 1 = digit 1
Color 2 = digit 2
Color 3 = multiplier
Color 4 = tolerance
Gold is the tolerance level.
To decode the colors on the resistor, we use this formula:
Resistance = (Digit 1 * 10 + Digit 2) * Multiplier
Digit 1 = Red
Digit 2 = Red
Multiplier = Black
Tolerance = Gold
Resistance = (2 * 10 + 2) * 1
Resistance = 22 Ω
Therefore, a resistor has the following colored stripes: red, red, black, gold. Its resistance is equal to 22 Ω.
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What does it mean when white light is diffracted and at a particular location the color seen is blue?
Answer:
When white light is diffracted and at a particular location , the color seen is blue, this means that blue color is reflected while all other colors are absorbed or diffracted . This phenomenon is due to the absorbance of wavelengths of all other colors except blue.
Explanation:
A small diamond of mass 16.6 g drops from a swimmer's earring and falls through the water, reaching a terminal velocity of 2.2 m/s. (a) Assuming the frictional force on the diamond obeys f= -bv, what is b (in kg/s)? (Round your answer to at least four decimal places.) 0.081 X kg/s (b) How far (in m) does the diamond fall before it reaches 90 percent of its terminal speed?
(a)The diamond's terminal velocity is 2.2 m/s, and its mass is 16.6 g. The frictional constant (b) is 0.081 kg/s, and (b) the distance it falls before reaching 90 percent of its terminal speed is 0.201 meters.
For part a: For finding the value of b, the formula used for the frictional force on the diamond, which is given as
f = -bv
where f is the frictional force and v is the velocity. Given that diamond reaches a terminal velocity of 2.2 m/s, substitute this value into the formula:
-bv = 2.2.
Since the mass of the diamond is given as 16.6 g, convert it to kilograms by dividing by 1000: 16.6 g = 0.0166 kg.
Now calculate for b:
-b * 2.2 = 0.0166.
Dividing both sides by -2.2,
b ≈ 0.00754545 kg/s
which is rounded to at least four decimal places is approximately 0.081 kg/s.
For part (b), calculate the distance the diamond falls before reaching 90 percent of its terminal speed. When an object reaches 90 percent of its terminal speed, it means that its velocity is 0.9 times the terminal velocity. Therefore, calculate this velocity by multiplying the terminal velocity by:
0.9: 0.9 * 2.2 m/s = 1.98 m/s.
Next, use the kinematic equation for a uniformly accelerated motion to find the distance travelled by the diamond. The equation is given as:
[tex]d = (v^2 - u^2) / (2a)[/tex]
where d is the distance, v is the final velocity, u is the initial velocity, and a is the acceleration. Since the diamond is falling freely, the initial velocity is 0, and the acceleration is equal to the gravitational acceleration, approximately [tex]9.8 m/s^2[/tex].
Plugging in the values,
[tex]d = (1.98^2 - 0) / (2 * 9.8) = 0.201 m[/tex].
Therefore, the diamond falls a distance of 0.201 meters before reaching 90 percent of its terminal speed.
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A 75kg stuntman falls 15m from the roof of a building. He then lands on an inflatable crash mat, which brings him to a stop in an additional 3.0m. What force must the crash mat provide to accomplish this?
To calculate the force the crash mat must provide, the principle of conservation of energy is used. The crash mat must provide a force of 4,410 N to bring the stuntman to a stop.
The potential energy lost by the stuntman as he falls is converted into work done by the crash mat to bring him to a stop.
The potential energy lost by the stuntman is given by the formula:
Potential Energy (PE) = mass (m) * acceleration due to gravity (g) * height (h)
It is given that Mass of the stuntman (m) = 75 kg, Acceleration due to gravity (g) = 9.8 m/s², Height fallen (h1) = 15 m, Additional height to stop (h2) = 3.0 m
The total potential energy lost by the stuntman is the sum of the potential energy lost while falling and the potential energy lost while coming to a stop:
Total Potential Energy Lost = m * g * h1 + m * g * h2
Substituting the given values:
Total Potential Energy Lost = 75 kg * 9.8 m/s² * 15 m + 75 kg * 9.8 m/s² * 3.0 m
Total Potential Energy Lost = 11,025 J + 2,205 J
Total Potential Energy Lost = 13,230 J
Since the crash mat brings the stuntman to a stop, the work done by the crash mat must be equal to the total potential energy lost.
Work done by the crash mat = Total Potential Energy Lost = 13,230 J
The work done by a force is equal to the force multiplied by the distance over which the force acts. In this case, the distance is the additional 3.0 m the stuntman comes to a stop:
Force * 3.0 m = 13,230 J
Force = 13,230 J / 3.0 m
Force ≈ 4,410 N
Therefore, the crash mat must provide a force of approximately 4,410 N to bring the stuntman to a stop.
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A bar is free to fall while completing the circuit. The resistor has resistance 38.8 Ω. The rod has a length of 1.42 m. The magnetic field is out of the page a magnitude of 0.10 T. The bar is falling with a speed of 95.77 m/s, and the speed is now constant because the force of gravity and the electromotive force are balanced. What is the mass of the bar?
From the equation of motion, the gravitational force acting on the bar is equal to its mass times the acceleration due to gravity.So, the mass of the bar is given as:m = F/g= 0.4038 N/9.81 m/s²= 0.0411 kgHence, the mass of the bar is 0.0411 kg.
A bar of mass m is free to fall while completing the circuit. The resistor has resistance 38.8 Ω. The rod has a length of 1.42 m. The magnetic field is out of the page at a magnitude of 0.10 T. The bar is falling with a speed of 95.77 m/s, and the speed is now constant because the force of gravity and the electromotive force are balanced.In order to determine the mass of the bar,
we need to make use of the following expression:emf = Blvwhere,emf = Electromotive forceB = Magnetic fieldl = Length of the conductorv = Velocity of the conductorNow, the electromotive force induced is given as:emf = Blv= 0.10 T × 1.42 m × 95.77 m/s= 1.365 VThe voltage drop across the resistor is equal to the electromotive force, therefore,
the current through the circuit is given by:V = IR38.8 Ω = I × 1.365 VI = 28.32 AThe force acting on the conductor is given by:F = BIl= 0.10 T × 1.42 m × 28.32 A= 0.4038 N
From the equation of motion, the gravitational force acting on the bar is equal to its mass times the acceleration due to gravity.So, the mass of the bar is given as:m = F/g= 0.4038 N/9.81 m/s²= 0.0411 kgHence, the mass of the bar is 0.0411 kg.
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A converging lens forms an image 16.0 cm from the line of symmetry with a -2.50 magnification. How far is the object from the image?
The object is located 4.0 cm from the image formed by the converging lens. The object is 22.4 cm from the image formed by the converging lens.
For determining the distance between the object and the image formed by the converging lens, lens formula is used:
[tex]1/f = 1/v - 1/u[/tex] ,
where f is the focal length of the lens, v is the distance of the image from the lens, and u is the distance of the object from the lens. In this case, since the magnification (m) is given, the magnification formula used:
[tex]m = -v/u[/tex].
Given that the magnification (m) is -2.50, substituting it into the magnification formula:
[tex]-2.50 = -v/u[/tex]
Simplifying the equation,
[tex]v = 2.50u[/tex]
Given that the image is formed 16.0 cm from the line of symmetry. Therefore, substituting v = 16.0 cm into the equation:
[tex]16.0 cm = 2.50u[/tex]
Solving for u,
[tex]u = 16.0 cm / 2.50 = 6.4 cm[/tex]
Thus, the object is located 6.4 cm from the lens. However, the distance between the object and the image is the sum of the distances from the object to the lens (u) and from the lens to the image (v). Therefore, the distance between the object and the image is:
[tex]u + v = 6.4 cm + 16.0 cm = 22.4 cm[/tex].
Hence, the object is 22.4 cm from the image formed by the converging lens.
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Calculate the magnitude of the electric field at one corner of a square 2.12 m on a side if the other three corners are occupied by 5.75x10-6 C charges. Express your answer to three significant figures and include the appropriate units. HÅ E- Value Units Submit Part B Request Answer
The magnitude of the electric field at one corner of the square, due to the charges at the other three corners, is approximately 2.42 × [tex]10^{6}[/tex]N/C.
To calculate the electric field at a point, we need to consider the contributions from each charge. In this case, the electric field at the corner of the square is the vector sum of the electric fields due to the charges at the other corners.
The electric field due to a point charge is given by Coulomb's Law:
E = k * q / [tex]r^2[/tex]
where E is the electric field, k is the Coulomb's constant (approximately 8.99 × 10^9 [tex]N m^2/C^2[/tex]), q is the charge, and r is the distance from the charge.
Considering the charges at the other corners, the electric field at the given corner is the vector sum of the electric fields due to each charge. Since the charges are the same at each corner, the magnitudes of the electric fields will be the same.
Let's calculate the electric field due to one of the charges at a corner:
E1 = k * q / r^2 = (8.99 × [tex]10^{9}[/tex][tex]N m^2/C^2[/tex]) * (5.75 × [tex]10^{6}[/tex]) C) / [tex](2.12 m)^2[/tex]
E1 ≈ 1.85 × [tex]10^{6}[/tex] N/C
Since there are three charges, the total electric field at the given corner will be three times the magnitude of E1:
E_total = 3 * E1 ≈ 3 * 1.85 × [tex]10^{6}[/tex] N/C ≈ 5.55 × [tex]10^{6}[/tex] N/C
However, we need to consider that the electric field is a vector quantity. The electric field vectors from the charges at the adjacent corners will cancel each other out partially, resulting in a smaller net electric field. Calculating the resultant vector requires considering the direction and magnitude of each electric field vector.
Without the specific arrangement of the charges or the angles between the sides of the square, it is not possible to provide an accurate calculation of the resultant vector. Therefore, the given answer provides only the magnitude of the electric field.
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A 4.50 × 10 5 -kg subway train is brought to a stop from a speed of 0.5 m/s in 0.4 m by a large spring bumper at the end of its track. What is the force constant k of the spring?
The force constant of the spring is [tex]-7.03 * 10^5 N/m[/tex] calculated using the force applied to the subway train during the deceleration process.
The force applied to the subway train can be determined using Newton's second law, which states that force (F) is equal to mass (m) multiplied by acceleration (a). In this case, the acceleration can be calculated using the formula
[tex]a = (v^2 - u^2) / (2s)[/tex],
where v is the final velocity (0 m/s), u is the initial velocity (0.5 m/s), and s is the distance travelled (0.4 m).
First, calculate the acceleration:
[tex]a = (0 - 0.5^2) / (2 * 0.4) = -0.625 m/s^2[/tex]
Next, calculate the force using Newton's second law:
[tex]F = m * a = 4.50 * 10^5 kg * -0.625 m/s^2 = -2.81 * 10^5 N[/tex]
Since the force exerted by the spring is equal in magnitude and opposite in direction to the force applied to the subway train, the force constant of the spring (k) can be calculated using Hooke's law:
F = -k * x,
where x is the displacement (0.4 m).
Rearranging the equation,
[tex]k = F / x = (-2.81 * 10^5 N) / (0.4 m) = -7.03 * 10^5 N/m[/tex]
Therefore, the force constant of the spring is [tex]-7.03 * 10^5 N/m[/tex].
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A 120 V, 50 Hz, 0.50 Hp, Two-Pole, Resistance Split-Phase Induction Motor Has The Following Main Winding Impedances: Z1 = (1.72 + J2.65) Ω Z2 = (2.36 + J2.65) Ω XM = 90 Ω PF&W = 35 W For A Slip Of 0.05 P.U, Determine: 1.The Magnitude Stator Current In Amps 2.For A Slip Of 0.05 P.U, Determine: The Magnitude Stator Current In Amps 3.The
A 120 V, 50 Hz, 0.50 hp, two-pole, resistance split-phase induction motor has the following main winding impedances:
Z1 = (1.72 + j2.65) Ω
Z2 = (2.36 + j2.65) Ω
XM = 90 Ω
PF&W = 35 W
For a slip of 0.05 p.u, determine:
1.The magnitude stator current in amps
2.For a slip of 0.05 p.u, determine: The magnitude stator current in amps
3.The input power in watts
4.Air-gap power in watts
The correct answer is 1) Magnitude of I1 = |I1| = 1.22 A 2) 1.22 A. 3) 4.85 Wb. and 4) 354 W.
1. The magnitude stator current in amps:
Given data:
Voltage, V = 120V
Frequency, f = 50 Hz
Output power, Pout = 0.50 hp
Slip, S = 0.05
Let the current flowing through stator winding is I1
Now the rotor input power Pinput is given by,
Pinput = Pout / efficiency = Pout / (Pout + losses)
For a two-pole induction motor,
Pinput = (Pout + Pf & W + Pg)
Where Pf & W is friction and windage loss and Pg is the air-gap power.
Now, Pout = 0.50 hp × 746 W/hp = 373 W
Pg = Pout (1 - S) = 373(1 - 0.05) = 354 W
Pf & W = 35 W (Given)
Pinput = (373 + 35 + 354) = 762 W
So, the stator input power Pin is,
Pin = Pinput / ω = Pinput / (2πf)
where ω is the angular velocity of the rotating magnetic field.ω = 2πf / P = 2π × 50 / 2 = 157.08 rad/sec
Pin = 762 / 157.08 = 4.85 Wb
Let's calculate the stator current. For that, we need to calculate the total impedance Z_total as
Z_total = Z1 + Z2 + jXM
= (1.72 + j2.65) + (2.36 + j2.65) + j90
= 4.08 + j95.3 Ω
The current through stator winding is given as,
I1 = V / Z_total
I1 = 120 / (4.08 + j95.3)
I1 = 1.22 ∠ -87.8° A
Magnitude of I1 = |I1| = 1.22 A (Ans)
2. For a slip of 0.05 p.u, determine: The magnitude stator current in amps:
We have already calculated the magnitude of the stator current in part 1, which is equal to 1.22 A.
3. The input power in watts:
The input power to the motor is calculated in part 1 which is equal to 4.85 Wb.
4. Air-gap power in watts:
The air-gap power is calculated in part 1 which is equal to 354 W.
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