Answer: evaporation.
Explanation: It soaks up moisture from soil in a garden for example, as well as the biggest oceans and lakes. The water level will decrease as it is exposed to the heat of the sun. (rewrite in your own words)
a cyclist in a race must climb a hill at a speed of 8 m/s. if the mass of the bike and the biker together is 80 kg, what must be the power output of the biker to achieve the goal?
In order to climb a hill at a speed of 8 m/s, the biker must output a certain amount of power. This power is calculated by multiplying the mass of the biker and bike together (80 kg) by the speed (8 m/s), and then multiplying that by the acceleration due to gravity (9.81 m/s2).
This equation is P= m*v*g, where P is power, m is mass, v is velocity, and g is the acceleration due to gravity. Thus, the power output of the biker must be 624.8 Watts in order to climb the hill at a speed of 8 m/s.
In addition to the power output needed to climb the hill, the biker must also consider the weight of the bike and biker as well as the terrain of the hill. A light bike and biker will require less power to climb the hill, whereas a heavier bike and biker will require more power.
The terrain of the hill is also important, as steeper hills require more power output to climb than shallower hills. Therefore, the biker must consider all of these factors in order to determine the power output needed to climb a hill at a speed of 8 m/s.
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a 5.0-g bullet leaves the muzzle of a rifle with a speed of 318 m/s. what force (assumed constant) is exerted on the bullet while it is traveling down the 0.91-m-long barrel of the rifle?
Answer:
F Δt = M ΔV impulse applied to bullet
F Δt = .005 kg * 318 m/s = 1.6 kg-m/sec
Δt = .91 m / 318 m/s = .0029 sec
F = 1.6 kg-m/s / .0029 sec = 560 Newtons
An electromagnetic wave is created when an electric dipole with its centre located at the origin of a Cartesian coordinate system oscillates along the x axis. At a position on the z axis far from the origin, the polarization of the wave is the orientation of the electric field, which is parallel to the x axis.
When an electric dipole oscillates along the x-axis, it creates an electromagnetic wave with an electric field that oscillates perpendicular to the direction of propagation of the wave.
Electric dipoles are widely used in various applications, including antennas, sensors, and electronic devices. The separation between the charges is known as the dipole moment and is denoted by the symbol "p". The concept of electric dipole is also essential in understanding many fundamental concepts in electromagnetism, such as electric fields, electric potentials, and electric forces.
The electric dipole moment plays an important role in many physical phenomena, such as the interaction between molecules in a polar solvent, the electric field near a polar molecule, and the interaction between charges in an external electric field. In the presence of an external electric field, an electric dipole experiences a torque that aligns the dipole moment with the electric field direction. This phenomenon is known as the orientational polarization of the dipole.
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Complete Question:-
An electromagnetic wave is created when an electric dipole with its centre located at the origin of a Cartesian coordinate system oscillates along the x axis. At a position on the z axis far from the origin, the polarization of the wave is the orientation of the electric field, which is parallel to the x axis.
The question, explain clearly please.
The magnitude of the resultant force exerted by the two ropes on the boat is 75 N.
What is the resultant of the two forces?
The resultant of the two forces is calculated by applying triangular of vector addition as shown below;
R² = T² + T² - 2(T²)cosθ
where;
R is the resultant of the two forcesT is the tension applied by each forceθ is the angle opposite to the resultant forceThe value of the angle opposite to the resultant force is calculated as follows;
θ = 180 - (6) + 60) (sum of angles in a triangle)
θ = 60⁰
The magnitude of the resultant force is calculated as;
R² = 75² + 75² - 2(75²) x cos(60)
R² = 5625
R = √5625
R = 75 N
So this is correct since all the angles of the triangles are equal, thus the length of the sides must be equal as well.
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Please help. I need to know why D is the correct answer. I will mark you as brainliest and I can help you with something you need help with, I just really need help on this. I will give you any amount of points you want
Vertical velocity after is just reversed in direction and came under gravitational acceleration. So correct option is B.
Describe Velocity?Velocity is a term commonly used in physics and engineering to describe the rate of change of an object's position with respect to time. It is a vector quantity, meaning it has both magnitude and direction, and is usually expressed in units of meters per second (m/s) or feet per second (ft/s).
Velocity can be positive, negative, or zero, depending on the direction of the object's motion relative to a reference point. Positive velocity indicates that the object is moving in the positive direction, negative velocity indicates that the object is moving in the negative direction, and zero velocity indicates that the object is not moving at all.
Velocity is an important concept in physics, as it is used to describe the motion of objects in both linear and circular paths, and is a key factor in determining the energy and momentum of those objects. It is also used in many real-world applications, such
vcosθ is horizontal velocity which will be constant in direction and magnitude.
Vertical velocity after is just reversed in direction and came under gravitational acceleration.
So correct option is B.
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which of the following changes might reverse the direction your motor spins? a. if we reverse the clips from the battery. b. if we flip the magnet over. c. if we do both (a) and (b).
The correct answer is C, which states that reversing the clips from the battery and flipping the magnet over will reverse the direction of motor spin.
What is a motor?A motor is a device that converts electrical energy into mechanical energy. This is accomplished through the interaction of a magnetic field with the electrical current flowing through it, resulting in a force that turns the motor's rotor. This spinning motion is commonly used to power a variety of devices, including fans, pumps, and conveyor belts.
What happens if you reverse the direction of motor spin?The direction of a motor's spin can be reversed by reversing the polarity of the electrical current flowing through it. This can be accomplished in a variety of ways, but two of the most common are reversing the clips from the battery and flipping the magnet over. If both of these changes are made, the motor will spin in the opposite direction.
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According to Newton's first law of pysics, which explains what happened to a baseball when it is hit with a bat?
The first law of physics, commonly referred to as the law of inertia, asserts that unless acted upon by a net external force, an object at rest will remain at rest and an object in motion will continue moving with a constant velocity.
What rule of motion is being violated when a baseball bat is struck firmly?A baseball is violently struck by a bat. According to Newton's third law, when object A pulls on item B, object B pulls in the opposite direction and with an equal amount of power.
How does a ball fit into Newton's first law?Since there is no friction, the ball should keep rolling in accordance with Newton's first law. The solution is in a different kind of friction, rolling friction is the term. Rolling friction happens when two imperfectly stiff objects come into contact.
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1. A lightbulb uses 470J of energy and produces 180J of heat and 290J of light. Calculate the efficiency of the lightbulb.
Answer:
Explanation:
The efficiency of a Bulb = Total Useful Energy/ Total Energy Supplied
Here in this particular case, Total Useful Energy is actually Light produced in Joules.
Therefore, Efficiency of the bulb = 290/470
=0.6170 or 61.70%
how would the width of the dips be difteren for the planets at different distances from the star? explain.
The width of the dips in the star's brightness would be different for planets at different distances from the star because the transit depth, which determines the dip width, depends on the planet's size relative to the star.
When a planet passes in front of its star, it blocks a portion of the star's light, causing a temporary decrease in brightness that can be observed from Earth. If the planet is small compared to the star, the dip in brightness will be small, and if the planet is large compared to the star, the dip will be larger. Therefore, the width of the dips in the star's brightness would be different for planets at different distances from the star because the transit depth depends on the planet's size relative to the star, and the apparent size of the planet changes with its distance from the observer.
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Answer the following questions:)
a) Megan's average speed is 12.5 meters per second.
b) The forward force on the bike becomes greater than the backward force on the bike.
What is Newton's Third Law of Motion?As according to Newton's Third Law of Motion, every action must have an equal and opposite reaction. This means that when one object exerts a force on a second object, The second object enforces an equal magnitude and opposite direction force on the first object.
a) Megan's average speed can be calculated by dividing the total distance by the time taken:
Average speed = Total distance / Time taken
Here, the total distance covered by Megan is 400 m and the time taken is 32 seconds.
Average speed = 400 m / 32 sec = 12.5 m/s
When Megan is travelling at a constant speed, the forward force on the bike must be equal and opposite to the backward force on the bike, as per Newton's Third Law of Motion. Therefore, the forward force and backward force on the bike are equal.
b) When Megan crouches down on the handles to be more streamlined, the air resistance on the bike reduces. This leads to a reduction in the backward force acting on the bike, while the forward force remains the same. Therefore, the forward force on the bike becomes greater than the backward force on the bike.
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calculate the magnetic force experienced by it as it enters a magnetic field of 2.2 t c. what is the radius of the circular path that the particle traverses?
The magnetic force experienced by the particle when it enters a magnetic field of 2.2 T is given by:
F = qVBsinθ
where q is the charge of the particle, V is its velocity, B is the magnetic field, and θ is the angle between the velocity vector and the magnetic field vector. Since the angle is not given, we can assume it to be 90 degrees. So, sinθ = 1. Hence, the formula reduces to:
F = qVB
Now, we need to find the radius of the circular path that the particle traverses. The magnetic force provides the necessary centripetal force for circular motion.
Hence, we can equate the two forces as follows:
F = mv^2/r
where m is the mass of the particle and v is its velocity. Since the velocity of the particle is not given, we can assume it to be constant.
Hence, we can combine the two formulas as follows:qVB = mv^2/rSolving for r, we get r = mv/qBSubstituting the given values, we get:
r = (1.6 × 10^-19 C)(5 × 10^7 m/s)/(1.6 × 10^-31 kg)(2.2 T) = 0.665 m
Therefore, the radius of the circular path that the particle traverses are 0.665 meters.
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what makes petroleum convenient to use as fuel for transportation? high energy density clean burning its liquid state
Petroleum is a widely used fuel source for transportation due to several reasons, including its high energy density, clean-burning properties, and liquid state.
Firstly, petroleum has a high energy density, which means that a small amount of petroleum can generate a large amount of energy. This is particularly important for transportation because it allows for a greater range or distance to be covered per unit of fuel, making it more efficient and cost-effective.
Secondly, petroleum is a clean-burning fuel, which means that it produces relatively fewer emissions and pollutants when it is burned compared to other fossil fuels like coal. This is important for environmental reasons, as reducing emissions can help to improve air quality and mitigate climate change.
Lastly, petroleum's liquid state makes it easy to transport and store, which is crucial for fueling vehicles. Liquids can be easily transported through pipelines or in tanks, and they can be easily dispensed at fuel stations. In addition, petroleum can be stored for long periods of time without deteriorating, which makes it an ideal fuel source for transportation.
In conclusion, petroleum is a convenient fuel source for transportation due to its high energy density, clean-burning properties, and liquid state. However, it is important to note that the use of petroleum has environmental impacts, and efforts are being made to transition to more sustainable and cleaner fuel sources.
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pike's peak is a 14,000-foot mountain in colorado. there isn't a baseball stadium there, but what if there was? the air is much less dense at pike's peak, and thus the friction due to the air is much less. how far in feet would a baseball travel if hit on pike's peak at a 45-degree angle with a speed of 130 mph off the bat? (enable sound for full effect.)
If a baseball was hit on Pike's Peak at a 45-degree angle with a speed of 130 mph off the bat, it would travel approximately 1171.24 feet.
The horizontal and vertical components of velocity can be found using the given initial velocity and launch angle.
Given that the velocity of the baseball is 130 mph, it can be converted to feet per second as follows:
130 mph = 130 x 5280 / 3600 ft/s = 190.67 ft/s
The horizontal and vertical components of velocity are given by:
[tex]v_x[/tex] = v x cos(θ) = 190.67 x cos(45) = 134.89 ft/s
[tex]v_y[/tex] = v x sin(θ) = 190.67 x sin(45) = 134.89 ft/s
The time taken by the baseball to travel to the highest point can be calculated using the vertical component of velocity and acceleration due to gravity.
The acceleration due to gravity is 32.2 ft/[tex]s^2[/tex].
t = [tex]v_y[/tex] / g = 134.89 / 32.2 = 4.19 s
The maximum height that the baseball can reach can be calculated as follows:
y = [tex]v_y[/tex] x t - (1/2) x g x [tex]t^2[/tex]= 134.89 x 4.19 - (1/2) x 32.2 x [tex]4.19^2[/tex] = 444.43 ft
The horizontal distance traveled by the baseball can be calculated using the horizontal component of velocity and time taken to reach the maximum height.
The time taken to reach the maximum height is half of the total time of flight.
t = (1/2) x 4.19 = 2.095 sd = [tex]v_x[/tex] x t = 134.89 x 2.095 = 282.38 ft
The total distance traveled by the baseball can be calculated using the horizontal distance and twice the maximum height.d = 2 x y + d = 2 x 444.43 + 282.38 = 1171.24 ft
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Question-
Pike's Peak is a 14,000-foot mountain in Colorado. The air is much less dense at Pike's Peak, and thus the friction due to the air is much less. If a baseball was hit on Pike's Peak at a 45-degree angle with a speed of 130 mph off the bat, how far in feet would the baseball travel?
Why are the outer Jovian planets larger and mostly gaseous?
O The Sun's gravity caused the denser rock and metals to settle in the outer region of the solar system.
Beyond the frost line, water and methane condensed into large icy planetesimals that attracted the abundant
light gases.
The spinning nebular disk forced lighter materials to move farther from the Sun, giving the outer planets a lower
mass.
A
O In the outer region of the solar system, hydrogen and helium froze to form large icy planets with strong gravity.
The outer Jovian planets are larger and mostly gaseous because they formed beyond the frost line, where water and methane condensed into large icy planetesimals that attracted the abundant light gases.
The outer planets are composed mainly of hydrogen and helium, which are the most abundant elements in the universe. These elements were able to condense into solid form beyond the frost line, where the temperature was low enough for them to freeze. The solid cores of the outer planets were able to attract and hold onto the abundant light gases, which formed the thick atmospheres of the outer planets.
In contrast, the inner terrestrial planets are smaller and denser because they formed inside the frost line, where the temperature was too high for hydrogen and helium to condense into solid form. Instead, the inner planets are composed mainly of rock and metal, which are denser than hydrogen and helium and were able to condense into solid form inside the frost line.
What are the Jovian planets?The Jovian planets are the outer planets of our solar system: Jupiter, Saturn, Uranus, and Neptune. These planets are also called “gas giants” or “giant planets” because they are much larger than the inner, rocky planets and are composed mainly of hydrogen and helium, which are the most abundant elements in the universe. The Jovian planets are named after their mythological namesake Jupiter, which is also known as Jove.
The Jovian planets have several characteristics in common, including their large size, low density, and thick atmospheres. They also have many moons and are surrounded by rings. The Jovian planets are located beyond the asteroid belt, which is the region of the solar system between Mars and Jupiter.
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if no divergence or convergence were occurring within the upper troposphere, what would happen to an existing surface low-pressure system?
An existing surface low-pressure system would probably stay stagnant or diminish due to the lack of support from upper-level dynamics if there was no divergence or convergence in the upper troposphere.
If there was convergence above, what would happen to your surface high pressure system?On the other hand, sea-level pressures rise in areas of convergence in the upper atmosphere. Surface high-pressure systems are often characterized by calm, largely clear weather due to the ensuing low-level divergence and sinking air.
How do divergence and convergence in the upper atmosphere affect the surface weather?The pressure systems traveling along the surface are enhanced or suppressed by this convergence and divergence. The air density above, for instance, will decrease when there is a region of diverging air in the upper troposphere.
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at what speed must the surface of the space station move so that the astronaut experiences a push on his feet equal to his weight on earth? the radius is 1700 m.
The surface of the space station must move at a speed of 2.04 m/s for the astronaut to experience a push on his feet equal to his weight on earth.
The speed of the surface of the space station must be equal to the centripetal acceleration of gravity in order for the astronaut to experience a push on his feet equal to his weight on Earth.
The centripetal acceleration of gravity (gc) is calculated by the formula gc = 4π²r/T², where r is the radius and T is the time period of a complete revolution. In this case, we are given a radius of 1700m. In order to calculate the time period (T) of a complete revolution, we need to know the orbital velocity of the space station.
Assuming a circular orbit, the orbital velocity of the space station is given by the formula v = √GM/r, where G is the universal gravitational constant (6.67×10-11 m3 kg-1 s-2) and M is the mass of the object the station is orbiting (i.e. Earth). Given that we have a circular orbit and all the relevant constants, we can now calculate the time period of a complete revolution (T) with the formula T = 2π√(r3/GM).
Therefore, the speed of the surface of the space station must be equal to the centripetal acceleration of gravity, which is given by the formula gc = 4π²r/T² = (4π²)(1700m)/[2π√(r3/GM)]2 = 2.04 m/s.
This means that the surface of the space station must move at a speed of 2.04 m/s in order for the astronaut to experience a push on his feet equal to his weight on Earth.
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If the skid mark from a crashed vehicle measures approximately 70 ft, and the measured friction coefficient is 0.25, what was the initial vehicle speed prior to braking?
A. 65 mph
B. 40 mph
C. 23 mph
D. 15 mph
Show the work for determining the initial velocity of the vehicle...show symbolic solution then numerical solution.
The car would have been moving too fast for a safe stop and would have been moving at a speed even higher if it could have produced a skid mark of 65 mph with a friction coefficient of 0.25.
How are you going to calculate the skid distance?A skid mark is measured from the beginning of one, which may start out light if two tyres lock and gradually darken as more tyres lock.
Skid coefficient of friction: what is it?Just dividing the vertical load by the horizontal force yields the coefficient of friction. For each section, the high, low, and average SN values are presented. The test speed has an impact on SN results; the slower the speed, the higher the SN.
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What is the strength (in V/m) of the electric field between two parallel conducting plates separated by 1.50 cm and having a potential difference (voltage) between them of 1.25 x 10^4 V?
The strength of the electric field between two parallel conducting plates separated by 1.50 cm and having a potential difference (voltage) between them of 1.25 x 104 V is 8.33 x 10⁵ V/m
What is an electric field?An electric field is an area in which an electric charge undergoes a force. It is usually produced by electric charges or by time-varying magnetic fields. An electric field is a vector field with a magnitude and direction that affects the motion of charged objects.
The formula for electric field strength is given by E = V/d, where,E is the electric field strength, V is the potential difference between the two parallel conducting plates, d is the distance between the two parallel conducting plates.
Given,V = 1.25 x 104 Vd = 1.50 cm = 0.015 mE = ?
Using the formula above, we can substitute the given values and calculate:
E = V/d = (1.25 x 104 V) / (0.015 m) = 833,333.33 V/m or 8.33 x 10⁵ V/m . The strength of the electric field is 8.33 x 10⁵ V/m
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your car (mass 1500 kg) has broken down, and you're pushing it to the side of the road. how much work do you have to do to get the car moving 0.5 m/s, if it starts from rest? give your answer in j.
Answer:
the answer is 0.5
Explanation:
consider 2 identical toy cars, car a and car b. car a is at rest. a child gives car b a shove so that the 2 toys collide head-on, stick together, and continue rolling in the same direction as that of car b before the collision. compared to the speed of car b before the collision, the speed of the joined cars is most likely:
The speed of the joined cars after the collision is most likely less than the speed of car b before the collision.
This is due to the principle of conservation of momentum, which states that the total momentum of a closed system remains constant if no external forces act on it. In this case, the system is the two toy cars, and the collision is a closed system because no external forces are acting on the cars.
Before the collision, car b has a certain momentum, and car a has zero momentum since it is at rest. After the collision, the two cars stick together and move in the same direction as car b before the collision. The total momentum of the system remains constant, but now it is shared between the two cars. Since the total mass of the system has increased, the speed of the joined cars after the collision will be less than the speed of car b before the collision.
To calculate the exact speed of the joined cars after the collision, we would need to know the masses and initial velocities of the two cars. However, we can say with certainty that the speed will be less than the speed of car b before the collision due to the conservation of momentum.
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________ is the major dissolved volatile constituent in both magmas and volcanic gases.
The major dissolved volatile constituent in both magmas and volcanic gases is water vapor (H₂O). This water vapor comes from the hydrous minerals present in the magma, which are then released during the volcanic eruption.
In magmas and volcanic gases, volatile constituents are dissolved gases such as water vapor (H2O), sulfur dioxide (SO2), hydrogen sulfide (H2S), carbon dioxide (CO2), hydrogen chloride (HCl), and hydrogen fluoride (HF). These gases are released from molten rock to the atmosphere during volcanic eruptions, influencing the climate and atmosphere of the planet.
The temperature, pressure, composition of the magma, and the surrounding environment all contribute to the amount and type of volatile constituents found in magmas and volcanic gases. Higher temperatures and pressures result in greater solubility of volatile constituents, while more oxidizing environments can promote the formation of gases such as sulfur dioxide rather than hydrogen sulfide.
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the h-r diagram is the most important graph in astronomy. one of the reasons that this graph is so powerful is the number of different kinds of data it shows. most graphs show two types of data. the h-r diagram shows seven. can you name these 7 types of information about stars that appear on the h-r diagram?
The H-R diagram is the most important graph in astronomy. One of the reasons that this graph is so powerful is the number of different kinds of data it shows. Most graphs show two types of data. The H-R diagram shows seven.
The seven types of information about stars that appear on the H-R diagram are listed below:
1. Color: Color is the key factor that allows us to compare stars in the H-R diagram.
2. Temperature: Temperature is the physical quantity that determines the star's color, and it can be read off the H-R diagram.
3. Absolute magnitude: The actual brightness of a star is referred to as its absolute magnitude, which can be measured by astronomers.
4. Luminosity: A star's luminosity is the amount of energy it radiates per unit time, which can also be measured by astronomers.
5. Spectral type: The H-R diagram includes the spectral type of the star, which tells us what kind of light the star emits.
6. Surface gravity: The force that holds an object on the surface of a star is referred to as surface gravity.
7. Radius: A star's size is represented by its radius, which can be determined from the H-R diagram.
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what is the frequency of a wave that travels 20 m/s with a wavelength of 200 meters?
a string of holiday lights can be wired in series, but all the bulbs go out if one burns out because that breaks the circuit. most lights today are wired in series, but each bulb has a special fuse that short-circuits the bulb-making a connection around it-if it burns out, thus keeping the other lights on. suppose a string of 50 lights is connected in this way and plugged into a 120 v outlet.
When the first bulb burns out, the power dissipated by each remaining bulb increases by a factor of approximately 1.0403.
To find the factor by which the power dissipated by each remaining bulb increases when the first bulb burns out, follow these steps:Step 1: Determine the initial voltage across each bulb.
In the initial situation, there are 50 bulbs connected in series and the total voltage across them is 120 V. The voltage across each bulb can be calculated by dividing the total voltage by the number of bulbs.
Initial voltage across each bulb = Total voltage / Number of bulbs = 120 V / 50 = 2.4 V
Step 2: Determine the new voltage across each bulb when the first bulb burns out.
When the first bulb burns out, its special fuse creates a connection around it. Now, there are 49 bulbs in the circuit with the same total voltage of 120 V.
New voltage across each bulb = Total voltage / New number of bulbs = 120 V / 49 ≈ 2.449 V
Step 3: Calculate the power dissipation factor.
The power dissipated in each bulb is proportional to the square of the voltage across it (P = V^2/R, where R is constant). To find the factor by which the power dissipated increases, we will take the ratio of the new power to the initial power.
Power dissipation factor = (New voltage / Initial voltage)^2 = (2.449 V / 2.4 V)^2 ≈ 1.0403
When the first bulb burns out, the power dissipated by each remaining bulb increases by a factor of approximately 1.0403.
Note: The question is incomplete. The complete question probably is: A string of holiday lights can be wired in series, but all the bulbs go out if one burns out because that breaks the circuit. Most lights today are wired in series, but each bulb has a special fuse that short- circuits the bulb—making a connection around it—if it burns out, thus keeping the other lights on. Suppose a string of 50 lights is connected in this way and plugged into a 120 V outlet. By what factor does the power dissipated by each remaining bulb increase when the first bulb burns out?
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2
0
a) Define the threshold frequency of a metal.
b)
00
10
12 14
f/10¹4 Hz
i. Explain how the graph shows that the threshold frequency of this metal is
5.0 x 10¹4 Hz.
ii.
Calculate the work function of this metal in joules.
a) The threshold frequency of a metal is the lowest frequency of electromagnetic radiation required to release electrons from a metal's surface in the photoelectric effect.
What information does the graph depicts?b) The given graph depicts the relationship between the frequency of incident electromagnetic radiation and the kinetic energy of released electrons for a specific metal.
ii. The slope of the graph, which represents Planck's constant, h, can be used to calculate the work function of the metal. The job function is provided by:
Work function = h x frequency threshold
The threshold frequency is 5.0 x 1014 Hz, according to the graph. The Planck constant is 6.626 x 10-34 J s. When these values are substituted into the preceding equation, the following results are obtained:
6.626 x 10-34 J s x 5.0 x 1014 Hz = 3.313 x 10-19 J.
ii) This metal's work function is 3.313 x 10-19 J.
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a) The threshold frequency of a metal is the lowest frequency of electromagnetic radiation required to release electrons from a metal's surface in the photoelectric effect.
What information does the graph depicts?b) The given graph depicts the relationship between the frequency of incident electromagnetic radiation and the kinetic energy of released electrons for a specific metal.
ii. The slope of the graph, which represents Planck's constant, h, can be used to calculate the work function of the metal. The job function is provided by:
Work function = h x frequency threshold
The threshold frequency is 5.0 x 10¹⁴ Hz, according to the graph. The Planck constant is 6.626 x 10⁻³⁴ J s. When these values are substituted into the preceding equation, the following results are obtained:
6.626 x 10⁻³⁴ J s x 5.0 x 10¹⁴ Hz = 3.313 x 10⁻¹⁹ J.
ii) This metal's work function is 3.313 x 10⁻¹⁹ J.
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Which statement describes what most likely occurs when a compass is placed next to a simple circuit made from a battery, a light bulb, and a wire?
A. A magnetic field created by the compass increases the current in the electrical circuit.
B. A magnetic field created by the compass causes the light bulb to stop working.
C. A magnetic field created by the electric current places negative charges on the compass.
D. A magnetic field created by the electric current causes the compass needle to move.
A magnetic field created by the electric current causes the compass needle to move. Option D is the correct answer.
When an electric current flows through a wire, it creates a magnetic field around the wire. The direction of the magnetic field is determined by the direction of the current. When a compass is placed next to the wire, the magnetic field created by the current causes the compass needle to move.
In a simple circuit made from a battery, a light bulb, and a wire, the electric current flows from the battery, through the wire, and through the light bulb, and then back to the battery. This creates a magnetic field around the wire, which can cause the compass needle to move when it is placed next to the wire. Hence, option D is correct choice.
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an empty bottle has a mass of 15g when full of alcohol of density 0.8g/cm3 it's mass is 47g . Calculate? 1) the volume of the bottle (2) it's mass when full of water (3) it's mass when full of mercury of density 13.6g/cm3
(1) The volume of the bottle is 40 cm³.
(2) The mass of the bottle when full of water is 40 g.
(3) The mass of the bottle when full of mercury is 544 g.
What is the volume of the bottle?We can use the given information and some basic equations to find the answers to the three parts of this question.
Let's start with some notation;
Let the mass of the empty bottle be m_bottle, the volume of the bottle be V_bottle the mass of the alcohol that fills the bottle be m_alcohollet the density of water be ρ_water = 1 g/cm³, and the density of mercury be ρ_mercury = 13.6 g/cm³.To find the volume of the bottle, we can use the formula for density:
density = mass / volume
Rearranging this equation to solve for volume, we get:
volume = mass / density
Using the given information, the mass of the alcohol is:
m_alcohol = 47 g - 15 g = 32 g
And the density of the alcohol is:
density_alcohol = 0.8 g/cm³
Plugging these values into the formula for volume, we get:
V_bottle = m_alcohol / density_alcohol = 32 g / 0.8 g/cm³ = 40 cm³
To find the mass of the bottle when full of water, we can use the density formula again:
density = mass / volume
This time, we want to solve for the mass of the water, given that the volume of the bottle is V_bottle = 40 cm³, and the density of water is ρ_water = 1 g/cm³.
Plugging in these values, we get:
ρ_water = m_water / V_bottle
Solving for m_water, we get:
m_water = ρ_water * V_bottle = 1 g/cm³ * 40 cm³ = 40 g
Finally, to find the mass of the bottle when full of mercury, we can use the same formula, but with the density of mercury:
density_mercury = mass_mercury / V_bottle
Solving for mass_mercury, we get:
mass_mercury = density_mercury * V_bottle
= 13.6 g/cm³ * 40 cm³
= 544 g
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If a wool sock is dragged across a rug, there is a buildup of static electricity on the wool sock. Which type of particle is transferred between the rug and the sock to cause this static?
answer choices
electron
proton
neutron
When a wool sock is dragged across a rug, there is a buildup of static electricity on the wool sock. The type of particle transferred between the rug and the sock to cause this static is an electron.
Static electricity is the electrical charges generated by electric charges that are not moving. In an electrically neutral atom or molecule, electrons and protons exist in equal numbers. A loss or gain of electrons results in a net electrical charge, and static electricity is generated when there is a charge buildup in an insulator.
The generation of electric charge depends on the nature of the materials, their humidity, and their temperatures. Rubber, plastic, and silk, for example, are excellent insulators that accumulate static electricity. Static electricity may result from the rubbing of insulators together or from an imbalance in the transfer of electrons between insulators. Electrons are transferred from the rug to the wool sock when a wool sock is dragged across a rug.
As a result, the wool sock has a static electrical charge.
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Two point charges are separated by a distance of 0. 15 m and the electrical force on Point A is 4. 0 x 10^2 N. If the points are moved so that they are separated by 0. 30 m, how much electrical force will point A experience?
The electrical force at point A will experienced F = 100 N.
According to the Coulomb's law in electrostatics, the Coulomb force acting between two charges is directly proportional to the product of two charges and inversely proportional to the square of distance between them.
Case I :
F = 400 N, d = 30 + 15 = 45 cm
400 ∝ 1/ 15^2
400 ∝ 1/225 ..... (1)
Case II:
Let F be the force, d = 30 cm
F ∝ 1/30^2
F ∝ 1/900 ....(2)
Dividing equation (2) by equations (1), we get
F / 400 = 225 / 900
F = 90000 / 900
F = 100 N
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while the platform is rotating, the hanging mass remains attached to the test mass and is not removed from the platform. true or false
True. When the platform is rotating, the hanging mass remains attached to the test mass and is not removed from the platform.
This is due to the centripetal force acting on the hanging mass, which is equal to the gravitational force of the test mass. This force is directed towards the center of the platform, thus ensuring that the hanging mass remains attached and is not removed from the platform. When the platform is rotating, the hanging mass remains attached to the test mass and is not removed from the platform. This statement is true.When the platform is rotating, the hanging mass remains attached to the test mass and is not removed from the platform. The situation described in the question is an example of centripetal force. Centripetal force is the inward force that causes a body to move in a circular path.
The string that is holding the hanging mass in place is providing the necessary centripetal force to keep the mass in place while the platform rotates. This force is necessary because without it, the mass would fly off the platform due to inertia.In addition to this, centripetal force is necessary to keep a body moving in a circular path. This is because any object that is moving in a circular path is constantly changing its direction of motion, which requires a force to be applied in the direction of the change. This force is provided by centripetal force.
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