Tachyons is not a real type of particle. The correct answer is d.
Tachyons are hypothetical particles that are proposed to travel faster than the speed of light. They have not been observed in experiments and are not considered to be real particles in the Standard Model of particle physics. The existence of tachyons would violate the theory of relativity, which states that the speed of light is the maximum speed at which matter or information can travel.
On the other hand, antiparticles, quarks, and neutrinos are all real types of particles that have been observed and studied in particle physics. Antiparticles are particles that have the same mass as their corresponding particles but have opposite charges. Hence, option d is the correct answer.
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During take off, a plane leaves the ground and
travels in a straight line until it reaches a
height of 10 km. The distance the plane flies
during take off should be in the range 57 km
to 62 km.
What is the smallest possible angle that the
path of the plane could make with the ground?
Give your answer in degrees to 1 d.p.
Not drawn accurately
Explanation:
please mark as brainliest answer
The smallest possible angle that the path of the plane could make with the ground is 18.9 degrees.
We are given that the plane travels a distance of 57 km to 62 km during take off, and that it reaches a height of 10 km. We want to find the smallest possible angle that the path of the plane could make with the ground.
The smallest possible angle will occur when the plane travels the maximum distance of 62 km..
To calculate the angle, we can use the following formula:
sin(theta) = opposite / hypotenuse
sin(theta) = 10 / 62
theta = sin⁻¹(10/62) = 18.9 degrees
As a result, the least conceivable angle that the plane's path might create with the ground is 18.9 degrees.
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When the capacitor in this circuit is fully charged, what is the current, I1, out of the battery? A. 1.00 A B. 0.67 A C. 0.40 A D. 0.22 A E. 0.0 A
The capacitor is fully charged, no current flows through it. As a result, the current I1 out of the battery is 0 A.
Option E 0.0 A is the correct option.
Explanation:
What is a capacitor?
A capacitor is a passive electronic component that stores energy in an electric field. Capacitors are commonly used in electronic circuits as energy storage devices because they are able to charge and discharge quickly.
What is a circuit?
An electric circuit is a path through which electric current flows in order to achieve a desired outcome. The given circuit consists of a 12 V battery, a 6 Ω resistor, and a 12 μF capacitor. When the capacitor in this circuit is fully charged, the voltage across the capacitor (Vc) is equal to the voltage of the battery (Vb).
From Ohm's law, I = V/RI = 12/6I = 2 A
The current flowing through the resistor is 2 A.
Since the capacitor is fully charged, no current flows through it. As a result, the current I1 out of the battery is 0 A. Option E 0.0 A is the correct option.
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The coefficient of static friction is 0.60 between the two blocks in the figure. The coefficient of kinetic friction between the lower block and the floor is 0.20. The force causes both blocks to cross a distance of 5.0 m starting from rest. What is the least amount of time in which this motion can be completed without the top block sliding on the lower block?
The least amount of time that can be completed without the top block sliding on the lower block if the coefficient of static friction is 0.6 is 1.09 seconds.
To find the аnswer, the following steps should be tаken: first, cаlculаte the mаximum force of stаtic friction between the two blocks by multiplying the coefficient of stаtic friction by the normаl force. This gives us:
[tex]F_{friction}[/tex] = 0.60 x (10 + 5) x 9.8
= 84.6 N
Since the аpplied force is less thаn the mаximum force of stаtic friction, the two blocks will remаin in stаtic equilibrium аnd will not slide relаtive to eаch other.
Next, we cаn cаlculаte the аccelerаtion of the lower block using the net force аcting on it:
[tex]F_{net}[/tex] = [tex]F_{applied}[/tex] - [tex]F_{friction}[/tex]
= 30 - 84.6
= -54.6 N
Since the force of friction аcts in the opposite direction of the аpplied force, we use а negаtive sign. We cаn then use Newton's second lаw,
F = mа, to find the аccelerаtion:
а = [tex]F_{net}[/tex] ÷ m
= -54.6 ÷ 15
= -3.64 m/s²
Finаlly, we cаn use the kinemаtic equаtion, x = (1/2)аt², to find the time it tаkes for the lower block to trаvel а distаnce of 5.0 m:
5 = (1/2)(-3.64)t²
Solving for t, we get t = 1.09 s
Therefore, the leаst аmount of time that cаn be completed without the top block sliding on the lower block is 1.09 seconds.
Your question is incomplete, but most probably the figures can be seen in the Attachment.
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A 325 kg merry-go-round with a radius of 1.40 m is spinning clockwise as viewed from above at 4.70 rad/s. A 36.0 kg child is hanging on tightly at 1.25 m from the rotation axis of the merry-go-round. Her father applies friction to the outer rim and the merry-go-round comes to a stop in 5.00 seconds.
Model the merry-go-round as a solid disk and the child as an object.
The inertia of a solid disk with mass M and radius R is I = MR2/2.
The inertia of an object with mass M and radius R is I = MR2.
a) calculate the acceleration of the merry-go-round
b) calculate the torque exerted by the father
c) describe the directions of the initial angular velocity, torque, and acceleration vectors.
Please show work for a and b.
a)The acceleration of the merry-go-round is -1.32 m/s² and b) The torque exerted by the father is 374.8 kg m² and c) The torque is said to be in the opposite direction of the direction of motion if the sign is negative.
What are velocity and acceleration?The word for the variations in displacement rates is velocity. The measurement of a shift in speed is called acceleration. Due to the fact that it comprises both magnitude and directional components, velocity is a form of vector quantity. Another vector number is acceleration, referring to the rate upon which velocity changes.
a) We may use the rotational kinematics equation to get the merry-go-acceleration: round's
ωf = ωi + αt
We know that ωi = 4.70 rad/s and t = 5.00 s.
To find, we may rearrange the equation as follows:
α = (ωf - ωi) / t
α = (0 - 4.70 rad/s) / 5.00 s
α = -0.940 rad/s²
The following is the tangential acceleration formula:
at = rα
where r denotes the merry-go-radius. round's
at = (1.40 m)(-0.940 rad/s²)
at = -1.32 m/s²
It is clear from the negative sign that the tangential acceleration is moving anticlockwise to the starting direction of motion.
b)We may use the equation to determine the torque the father applied:
τ = Iα
I = Imerry-go-round + Ichild
Imerry-go-round = (1/2)MR²
= (1/2)(325 kg)(1.40 m)²
= 318.5 kg m²
Ichild = MR²
= (36.0 kg)(1.25 m)²
= 56.25 kg m²
I = Imerry-go-round + Ichild
= 318.5 kg m² + 56.25 kg m²
= 374.8 kg m²
Substituting :
α = -0.940 rad/s² and I = 374.8 kg m² into the torque equation:
τ = Iα = (374.8 kg m²)(-0.940 rad/s²) = -352.8 Nm
The torque is said to be in the opposite direction of the original direction of motion if the sign is negative. This indicates that the father is slowing the merry-go-round by turning a clockwise torque.
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most of the exoplanets discovered around other stars a. are more massive than earth and orbit very far from the star. b. are more massive than earth and orbit very close to the star c. are less massive than earth and orbit very far from the star. d. are less massive than earth and orbit very close to the star.
Most of the exoplanets discovered around other stars are more massive than Earth and orbit very close to the star, (option b).
These types of exoplanets are commonly referred to as "hot Jupiters" because they are similar in size to Jupiter, but have much shorter orbital periods due to their close proximity to their host star. Hot Jupiters typically orbit their stars at a distance of less than 0.1 astronomical units (AU), which is much closer than the distance between Mercury and the Sun in our solar system.
The reason why hot Jupiters are easier to detect than smaller planets located further away from their star is that they cause a larger gravitational "wobble" in their star, which can be detected by astronomers using the radial velocity method.
Additionally, the transit method is another commonly used technique to detect exoplanets, and hot Jupiters are more likely to transit their star due to their close proximity.
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In 1924, Prince Louis de Broglie suggested that all moving particles demonstrate wave-like
behaviour.
a) State the de Broglie equation and define all the symbols.
b) Neutrons may be used to study the atomic structure of matter. Diffraction effects are
noticeable when the de Broglie wavelength of the neutrons is comparable to the spacing
between the atoms. This spacing is typically 2.6 x 10-10 m.
i. Suggest why using neutrons may be preferable to using electrons when investigating
matter.
ii.
Calculate the speed (v) of a neutron having a de Broglie wavelength of
2.6 x 10-¹0 m. The mass of a neutron is 1.7 x 10-27 kg.
a) The de Broglie equation is λ = h/mv, where λ is the wavelength of a particle, h is Planck's constant (6.626 x 10^-34 J s), m is the mass of the particle, and v is its velocity.
b) Neutrons may be preferable to electrons when investigating matter because neutrons have a higher penetrating power than electrons and can pass through thicker samples. Neutrons also interact differently with matter than electrons, allowing them to provide unique information about the atomic structure of materials.
To calculate the speed of a neutron with a de Broglie wavelength of 2.6 x 10^-10 m, we can rearrange the de Broglie equation to solve for v:
v = h/(mλ)
Plugging in the values, we get:
v = (6.626 x 10^-34 J s) / (1.7 x 10^-27 kg x 2.6 x 10^-10 m)
v = 1.56 x 10^3 m/s
Therefore, the speed of the neutron is approximately 1.56 x 10^3 m/s.
3.consider two elastic collisions: 1) a golf ball with speed v hits a stationary bowling ball head-on 2) a bowling ball with speed v hits a stationary golf ball head-on in which case does the golf ball have the greater speed after the collision?
Given two elastic collisions; A golf ball with speed v hits a stationary bowling ball head-on and a bowling ball with speed v hits a stationary golf ball head-on. The golf ball have the greater speed after the collision is the first case (A golf ball with speed v hits a stationary bowling ball head-on).
When two elastic bodies collide, the relative speed between them after the collision is equal to the relative speed before the collision. However, the final velocities of the colliding bodies will depend on their masses. In this case, the mass of the bowling ball is more significant than that of the golf ball. Therefore, in the second case, the golf ball will not bounce as fast as in the first case. The coefficient of restitution (e) measures the fraction of relative speed between the two colliding objects after the collision, compared to the relative speed before the collision.
For an elastic collision, the coefficient of restitution is one, which means the relative speed before and after the collision is the same.The following equation can be used to calculate the final velocities: Vf1=(m1−m2/m1+m2) V1+(2m2/m1+m2) V2Vf2=(2m1/m1+m2) V1+(m2−m1/m1+m2) V2where V1 and V2 are the initial velocities of the two objects, m1 and m2 are their masses, and Vf1 and Vf2 are their final velocities.
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What can you do to a parallel circuit to vary the amount of current that flows through each branch?
To vary the amount of current that flows through each branch of a parallel circuit, we can:
1. Adjust the resistance
2. Add or remove branches
3. Adjust the voltage
1. Adjust the resistance: The amount of current flowing through a branch depends on the resistance in that branch.
You can change the resistance of a branch by adding or removing resistors, or by adjusting the value of variable resistors (also known as potentiometers or rheostats).
As resistance increases, the current flowing through the branch decreases, and vice versa.
2. Add or remove branches: In a parallel circuit, the total current is divided among the individual branches.
By adding or removing branches, you can affect the current distribution among the remaining branches.
For example, if you add an additional branch with the same resistance as the other branches, the current in each branch will be reduced as the total current is now divided among more branches.
3. Adjust the voltage: The current flowing through a branch is directly proportional to the voltage applied to the circuit. By changing the voltage source (battery or power supply) or adjusting the voltage, you can affect the current distribution among the branches.
Increasing the voltage will increase the current in all branches, while decreasing the voltage will decrease the current in all branches.
Remember to always be cautious when working with electrical circuits.
Turn off the power before making any adjustments or changes to the circuit, and follow proper safety procedures.
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for a loop of current-carrying wire in a uniform magneticfield the potential energy is a minimum if the magnetic dipolemoment of the loop is:
The potential energy of a current-carrying loop in a uniform magnetic field is at a minimum when the magnetic dipole moment of the loop is aligned with the magnetic field. This means that the loop is in a position of stable equilibrium.
The magnetic dipole moment of a current-carrying loop is given by the product of the current, the area of the loop, and a vector that is perpendicular to the plane of the loop. When the loop is aligned with the magnetic field, the angle between the magnetic dipole moment and the magnetic field is zero, and the potential energy of the loop is at a minimum.
If the loop is tilted away from this position, the potential energy increases, and the loop experiences a restoring torque that tends to align it with the magnetic field.
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2. For timet> 0 in seconds, a police car is patrolling a local street. The position along
the straight, flat road is given in meters by the function P(t)=25t. Directly ahead
of the police car, a bank robber's getaway car begins to speed up to leave the scene
of the crime. The getaway car's position along the road is given in meters by the
function G(t)=75+2.5. Graph the functions P and G on the same set of axes. What
conclusion can you draw? Does the police car catch the getaway car? Determine the
time at which the police car intersects the getaway car, or determine how close the
police car gets to the getaway car before the bank robber evades capture.
Answer:
The position of the police car along the road is given by the function P(t) = 25t. The position of the getaway car along the road is given by the function G(t) = 75 + 2.5t.
To determine if and when the police car intersects with the getaway car, we can set P(t) equal to G(t) and solve for t: P(t) = G(t) 25t = 75 + 2.5t 22.5t = 75 t = 3.33 seconds
So, after approximately 3.33 seconds, the police car will intersect with the getaway car.
which layer of the sun is only seen during a total solar eclipse? responses core core photosphere photosphere corona corona convective zone
The layer of the sun that is only seen during a total solar eclipse is the corona.
What is the corona?The corona is a white halo of superheated gases that surrounds the Sun. The corona is a layer of the Sun's atmosphere that is very dim and can only be seen during a total solar eclipse. The corona's temperature is millions of degrees, which is hotter than the Sun's surface. Because of the Sun's magnetic field, the corona is shaped in irregular shapes and elongated formations.
The photosphere is the sun's visible surface, and it is the deepest layer of the sun that we can observe. The sun's core is located at the center of the sun, where fusion takes place to generate energy. The convective zone is just below the surface of the photosphere, and it is where gas moves around in large, circulating patterns to transfer energy to the sun's surface.
The corona, which is a bright, faint halo visible during a total solar eclipse, is the outermost layer of the sun.
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Earth is closer to the sun in December than it is in July. What happens to the orbital speed of the planet between July and December? Explain your answer
The Earth's orbital speed increases slightly as it gets closer to the Sun, reaching its fastest speed in December, and decreases slightly as it moves away from the Sun, reaching its slowest speed at aphelion in July.
What is orbital speed?
The orbital speed of the Earth changes slightly as it moves around the Sun due to changes in its distance from the Sun. As the Earth gets closer to the Sun, it experiences a stronger gravitational pull, which increases its speed, and as it moves farther away from the Sun, the gravitational pull decreases, causing the speed to decrease.
In July, the Earth is at aphelion, which is the farthest point in its orbit from the Sun. At this point, the Earth is about 94.5 million miles away from the Sun. In December, the Earth is at perihelion, which is the closest point in its orbit to the Sun. At this point, the Earth is about 91.5 million miles away from the Sun. Therefore, the Earth is about 3 million miles closer to the Sun in December than it is in July.
As the Earth gets closer to the Sun, its orbital speed increases due to the stronger gravitational pull from the Sun. Therefore, in December, the Earth is moving faster in its orbit around the Sun than it is in July. This increase in speed is not noticeable to us on Earth, but it is a measurable change in the velocity of the Earth's orbit. In fact, the Earth's speed at perihelion is about 30 km/s (18.64 mi/s) compared to about 29.29 km/s (18.21 mi/s) at aphelion.
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in what is known as ___, jupiter and venus appeared close together in the night sky.
In what is known as a conjunction, Jupiter and Venus appear to be passing each other quite close together in the night sky.
In Los Angeles In what is known as a conjunction, Jupiter and Venus appear to be passing each other quite close together in the night sky.
The amount of light reflected by each planet varies. Certain planets' composition and atmosphere prevent them from reflecting a significant amount of light. Yet, extremely dense clouds of gases and sulfuric acid surround Venus. Sunlight easily reflects off of these clouds, causing them to reflect light. Almost 75% of the sunlight that hits Venus' surface is reflected.
In addition, Venus is quite visible because it is so close to the Earth. It is in a good location for reflecting sunlight towards the earth and being quite visible because it is somewhat close to the Sun (although Mercury is closest to the Sun).
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A person sitting in an artificial satellite of the earth feels weightlessness, but a person standing on moon has weight through the moon is a satellite of the earth. Why?
an angry rhino with a mass of 2400 kg charges directly toward you with a speed of 4.80 m/s. before you start running, as a distraction, you throw a 0.180 kg rubber ball directly at the rhino with a speed of 7.90 m/s. determine the speed of the ball (in m/s) after it bounces back elastically toward you.
The speed of the ball after it bounces back elastically toward you when throwing a 0.180 kg rubber ball directly at the rhino with a speed of 7.90 m/s is 7.90 m/s.
The formula for elastic collisions is m1v1 + m2v2 = m1v1' + m2v2' where m is the mass, v is the initial velocity, and v' is the final velocity after the collision. In this case, the rhino is massive and the ball is light, so we will assume that the rhino does not change speed after the collision.
We are given:
m1 = 0.180 kgInitial Velocity1 = 7.90 m/sm2 = 2400 kgInitial Velocity2 = 4.80 m/sWe can then solve for the final velocity of the ball:
= m1v1 + m2v2 = m1v1' + m2v2'
⇒ (2400 kg)(4.8 m/s) + (0.18 kg)(7.9 m/s) = (2400 kg)(4.8 m/s) + (0.18 kg)(v2')
⇒ 11,520 kg·m/s + 1.422 kg·m/s = 11,520 kg·m/s + 0.18 kg·v2'
⇒ v2' = (11,520 kg·m/s + 1.422 kg·m/s - 11,520 kg·m/s) / 0.18 kg = 7.90 m/s
Therefore, the speed of the ball after it bounces back elastically toward you is 7.90 m/s.
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for a satellite to be in a circular orbit 850 km above the surface of the earth, what orbital speed must it be given?
the orbital speed of the satellite in a circular orbit 850 km above the surface of the Earth is approximately 7,663 m/s.
To determine the orbital speed of a satellite in a circular orbit, we can use the following formula:
v = √(GM/r)
Where v is the orbital speed, G is the gravitational constant[tex](6.674 x 10^-11 m^3/kg*s^2)[/tex], M is the mass of the Earth [tex](5.97 * 10^24 kg)[/tex], and r is the distance from the center of the Earth to the satellite (850 km + the radius of the Earth, which is approximately 6,378 km).
First, we need to convert the distance to meters:
r = 850,000 m + 6,378,000 m = 7,228,000 m
Plugging in the values, we get:
v = √[tex]((6.674 * 10^-11 m^3/kg*s^2) * (5.97 * 10^24 kg) / (7,228,000 m))[/tex]
Simplifying the equation, we get:
v = 7,663 m/s
Therefore, the orbital speed of the satellite in a circular orbit 850 km above the surface of the Earth is approximately 7,663 m/s.
This high speed is necessary to keep the satellite in orbit, as it must balance the force of gravity with its own centrifugal force. If the satellite were traveling too slowly, it would be pulled back towards the Earth by gravity, and if it were traveling too quickly, it would escape Earth's gravitational pull and fly off into space.
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when a light source is moving away from the observer, what happens to the observed light? (there may be more than one correct answer.)
The observed light will appear dimmer and will have its wavelength stretched, resulting in a decrease in frequency and an increase in energy. The light's color will also shift towards the red end of the spectrum. This phenomenon is known as the Doppler Effect.
When a light source moves away from an observer, the observed light appears to have a longer wavelength. This phenomenon is known as redshift.
Redshift is the phenomenon in which the light of an object is shifted towards the longer wavelength end of the spectrum when it is moving away from an observer. This shift is due to the Doppler effect, which causes an increase in the wavelength of light from a moving light source. As the speed of light remains constant, the frequency of light decreases as the wavelength increases. This can be observed in the light of galaxies that are moving away from us. The light from these galaxies appears redder than it would if the galaxies were stationary. This is because the light is being shifted towards the longer wavelength, red end of the spectrum. The amount of redshift is proportional to the speed of the object and the distance it is from the observer.
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suppose we change the tires of our jaguar xkr to a smaller diameter, and that the speedometer is set to read the linear speed of the jaguar xkr by measuring the angular speed of the tires. how will this affect the speedometer reading when compared to the true linear speed of the jaguar xkr?
If the tires of the Jaguar XKR are changed to a smaller diameter, the speedometer will read a higher linear speed than the actual speed of the Jaguar XKR.
Linear speed is the speed at which an object travels in a straight line. A speedometer is a device that is utilized to measure the speed of a vehicle. The angular speed of the wheels is determined by the speedometer.To calculate the linear speed of the Jaguar XKR, the speedometer measures the angular speed of the wheels. The speedometer's reading will be higher than the true linear speed of the Jaguar XKR if the tires are switched to a smaller diameter.
The angular speed of the smaller tires is greater than the angular speed of the bigger tires. The smaller tires revolve more times per minute than the larger tires. This leads to a higher speedometer reading when compared to the true linear speed of the Jaguar XKR.
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Measurements that are closely grouped around the mean are __________. What one word completes this sentence?
Measurements that are closely grouped around the mean are precise.
What is consistency of measurements?When measurements are closely grouped around the mean, it means that the data points are clustered together and are not spread out widely.
This indicates that the measurements are consistent and that the values are similar to one another. This consistency in the measurements is what we refer to as precision.
In other words, precision refers to the degree of closeness of individual measurements to each other. The more precise the measurements, the less variation there is between the individual data points.
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Answer:"precise"
Explanation:
Precision is different from accuracy. Measurements that are very close to each other, but not close to the true value would be precise, but not accurate.
an emf of 20.5 mv is induced in a 499 turn coil when the current is changing at a rate of 11.5 a/s. what is the magnetic flux through each turn of the coil at an instant when the current is 4.00 a? (enter the magnitude.)
The magnetic flux through each turn of the coil at an instant when the current is 4.00 A is 8.18×10^−5 T·m².
An EMF (electromotive force) of 20.5 mV is induced in a 499 turn coil when the current is changing at a rate of 11.5 A/s. The question requires us to calculate the magnetic flux through each turn of the coil at an instant when the current is 4.00 A.
To determine the solution, we'll use the formula of EMF induced in a coil of N turns according to Faraday's law which is expressed as; EMF= -N(dФ/dt) Where, N is the number of turns in the coil, dФ/dt is the rate of change of magnetic flux.
The rate of change of magnetic flux dФ/dt is given as;
dФ/dt = EMF/N
= 20.5×10^-3/499
= 0.041 A/s
We also know that the magnetic flux Ф through each turn of the coil is given as;Ф = NAB where, A is the area of the coil and B is the magnetic field.
Assuming the coil is flat and circular, the area of the coil is given as; A = πr^2 = πd^2/4
Where r is the radius and d is the diameter of the coil. Substituting the value of N, d and dФ/dt, we have;Ф = NAB = N(Bπd^2/4)
= 499(0.041/π)(0.1)^2/4
= 8.18×10^−5 T·m²
Therefore, the magnetic flux through each turn of the coil at an instant when the current is 4.00 A is 8.18×10^−5 T·m².
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The picture above shows a sound wave. If the distance from A to B was increased, the pitch of the sound would
The sound's pitch would decrease as the distance from point A to point B increased.
What does a sound's pitch mean?When a sound is played, its pitch—how high or low it is—is known.A sound with a high pitch is known as a high sound, and a sound with a low pitch is known as a low sound. In the illustration above, as the distance grows, the pitch will decrease.How does a sound wave change as the pitch rises?Pitch and frequency are connected, therefore as pitch rises, so does frequency, which reduces wavelength. Hence, the relationship between wave frequency and wave velocity is straightforward. Raising the pitch raises.For more information on sound wave kindly visit to
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a crate rests in the rough bed of a truck. when the truck accelerates to the left at a constant rate, what is the direction of the friction force acting on the crate? (you can assume that the crate doesn't slip in the bed of the truck.)
The friction force acting on the crate will be in the opposite direction to the acceleration of the truck.
The friction force is opposite, because an unbalanced force, such as acceleration, will result in a friction force in the opposite direction. This is known as the Law of Inertia. The magnitude of the friction force will be dependent on the coefficient of friction between the crate and the truck bed, as well as the weight of the crate.
Assuming that the crate does not slip in the bed of the truck, then the friction force will always oppose the acceleration and will remain constant, even if the acceleration increases or decreases. This is because the static friction between the crate and the bed of the truck is much greater than the kinetic friction, and the static friction is only exceeded when the acceleration becomes too great for it to resist.
In summary, when the truck accelerates to the left at a constant rate, the friction force acting on the crate will be in the opposite direction to the acceleration of the truck. This force will remain constant until the acceleration becomes too great for the static friction to resist.
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How is electric force related to charge?
A. Inversely related to charge
B. Directly related to charge
C. Weaker when closer to a sphere
D. Conservative
Electric force is directly related to charge.
According to Coulomb's law, the electric force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. This means that if the charge on one of the objects increases, the electric force between them will also increase proportionally, assuming the distance between them remains the same.
Therefore, the correct answer is:
B. Directly related to charge.
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for a given incident energy of an electromagne;c wave, why is the radia;on pressure on a perfectly reflec;ng surface twice as great as that on a perfectly absorbing surface?
The radiation pressure on a perfectly reflecting surface is twice as great as that on a perfectly absorbing surface because the reflection of an electromagnetic wave causes its momentum to double.
Electromagnetic waves are transverse waves consisting of mutually orthogonal electric and magnetic fields that oscillate with a time-varying amplitude and frequency as they travel through space. EM waves are generated by vibrating charged particles and are propagated through space at the speed of light in a vacuum.
Radiation pressure refers to the pressure exerted on a surface due to the impact of electromagnetic radiation. It is an expression of the momentum transfer of photons to a surface. Incident energy refers to the energy carried by an electromagnetic wave that strikes a surface or object. It is proportional to the amplitude of the wave and the duration of the pulse.
The radiation pressure on a perfectly reflecting surface is twice as great as that on a perfectly absorbing surface for a given incident energy of an electromagnetic wave because the reflection of an electromagnetic wave causes its momentum to double. When an EM wave is absorbed by a surface, the momentum of its photons is entirely transferred to the surface, resulting in the exertion of a force on the surface equivalent to the momentum of the photons.
The reflection of an EM wave, on the other hand, doubles the momentum of the wave, resulting in a greater force being exerted on the surface. Hence, the radiation pressure on a perfectly reflecting surface is twice as great as that on a perfectly absorbing surface.
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move the smaller, left, powered, primary coil close to or inside the larger, secondary coil. why is no current generated in the secondary coil? (1 mark)
Current induced only when there is a varying magnetic field is no current generated in the secondary coil.
What is the function of secondary coil?If the secondary winding is linked to an electrical circuit, the electromotive force there will cause current to move in the secondary circuit. A transformer's secondary current is the winding that gets power from the primary winding via electromagnetic induction.
The secondary coil is a part of a transformer, which is an electrical device that is used to transfer electrical energy between circuits through the use of electromagnetic induction. The function of the secondary coil is to receive the electrical energy that is transferred from the primary coil of the transformer and to convert it into a different voltage level, depending on the ratio of the number of turns of wire in the primary and secondary coils.
In other words, the secondary coil of a transformer is responsible for stepping up or stepping down the voltage of the electrical energy that is being transferred from the primary coil. For example, in a step-up transformer, the voltage is increased in the secondary coil, while the current is decreased. Conversely, in a step-down transformer, the voltage is decreased in the secondary coil, while the current is increased.
What use does the secondary coil serve?The main is referred to as such, and the secondary as such. AC electricity enters the main coil here. Where the stream is induced to carry out any type of energy transfer is in the secondary coil. In this instance, a light bulb is lit by the current.
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if the star sirius rises at 8:00 p.m. tonight, at what time will it rise tomorrow night, to the nearest minute? group of answer choices 7:44 pm 7:48 pm 7:52 pm 7:56 pm 8:00 pm 8:04 pm
Sirius will rise tomorrow night at approximately 7:56 p.m., to the nearest minute, if it rose at 8:00 p.m. tonight since each successive rise occurs about 4 minutes earlier.
Sirius is the brightest star in the Earth's night sky and is part of the constellation Canis Major. The timing of when Sirius rises and sets can vary depending on the observer's location and the time of year. However, assuming a 24-hour day and negligible atmospheric refraction, Sirius will rise approximately four minutes earlier each night. This is due to the Earth's rotation and its orbit around the sun, causing the stars to appear to shift in the night sky. Therefore, if Sirius rises at 8:00 p.m. tonight, it will rise approximately four minutes earlier tomorrow night, at around 7:56 p.m. This gradual shift in the timing of star rises and sets is a fundamental concept in astronomy and celestial navigation.
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a nearsighted person has a near point of 14 cm and a far point of 40 cm .what power corrective lens is needed for her to have clear distant vision?
Power of the corrective lens needed for the nearsighted person to have clear distant vision is 0.025 diopters.
What is nearsightedness?Nearsightedness is a common vision condition in which near objects appear clear and objects farther away look blurry.
As P = 1/f
P is power of the lens in diopters, and f is focal length of the lens in meters.
Given, near point of the nearsighted person is 14 cm, which means that her eye can focus on objects that are as close as 14 cm. Given, far point is 40 cm, which means that her eye cannot focus on objects that are farther away than 40 cm.
As 1/f = 1/do + 1/di
do is object distance (which is at infinity for distant objects), di is image distance (which is the distance from the lens to the eye), and f is focal length of lens.
1/f = 1/di
di = f
f = 1/P, we get:
di = 1/P
1/P = 1/di = 1/40 cm
P = 40 cm⁻¹ = 0.025 diopters
Therefore, power of the corrective lens needed for the nearsighted person to have clear distant vision is 0.025 diopters.
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light of wavelength 471 nm in air enters a fishbowl filled with water, then exits through the crown-glass wall of the container. what is the wavelength of the light in the water? the refraction index for water is 1.333 and for crown-glass 1.52.
After calculations, we come to know that the wavelength of light in the water is 350 nm.
Let us first calculate the critical angle for crown glass.
The formula for the critical angle is: n2/n1 = sin θ2/sin θ1
Let us plug in the values of refractive indices: n2 = 1.52n1
= 1.00 (air)n2/n1
= 1.52/1
= 1.52sin θ2/sin θ1
= 1.52/1sin θ1
= sin(θ2)/1.52sin θ1
= sin^-1(1/1.52)sin θ1 = 41.1°
The critical angle for crown glass is 41.1°.
The angle of incidence of the light ray in air is the same as the angle of refraction of the light ray in water.
We can use the formula for refraction of light: n2 sin θ2 = n1 sin θ1
Let us plug in the values of refractive indices and angle of incidence: n1 = 1.00 (air) n2 = 1.333 (water)
sin θ1 = sin 0°
= 0sin θ2
= (n1 sin θ1)/n2sin θ2
= (1.00 × 0)/1.333sin θ2 = 0
The angle of refraction of the light ray in water is 0°.
Now, let us calculate the wavelength of light in water using the formula: n1λ1 = n2λ2
Let us plug in the values of refractive indices and wavelength of light in air: n1 = 1.333 (water) n2 = 1.52 (crown glass)λ1 = 471 nmn1λ1
= n2λ21.333 × 471
= 1.52λ2λ2
= 1.333 × 471/1.52λ2 = 350 nm
Therefore, the wavelength of light in the water is 350 nm.
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A 120 kg lawn tractor goes up at a 21 degree incline with a constant speed that is 12 m long in 2.5 calculate the power that is developed by the tractor
The lawn tractor generates 1.96 kW of power.
How does a tractor develop power?To generate power, tractors need to consume fuel. Although a number of fuels may be utilized with steam engines, wood and coal were by far the most popular. The use of solid fuels in internal combustion engines is not viable. Turpentine was a fuel that some of the first engine designers utilized.
The lawn tractor's work may be estimated as follows:
W = Fd cosθ
F = mgsinθ = (120 kg)(9.81 m/s²)sin(21°) = 408.9 N
The displacement is the length of the incline:
d = 12 m
The work done by the tractor is:
W = (408.9 N)(12 m)cos0°
= 4,906.8 J
The pace of task completion is determined by the tractor's power, which may be computed as follows:
P = W/t
where t represents how long it took the tractor to ascend the gradient. T = 2.5 s in this instance, so:
P = 4,906.8 J / 2.5 s
= 1,962.7 W or 1.96 kW
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6. The approach to development LEAST likely to
result in sprawl is
a. leapfrog development.
b. commercial (strip) development.
c. high-density multi-use development.
d. low-density single-use development.
The approach to development least likely to result in sprawl is: C. high-density multi-use development.
What is sprawl?Sprawl is characterized by the spread of low-density, single-use development over a large area, often in a decentralized pattern. This type of development is typically associated with automobile-dependent land use patterns and long commuting distances, which contribute to traffic congestion, air pollution, and a variety of other negative environmental and social impacts.
High-density multi-use development, on the other hand, typically involves compact, mixed-use development patterns that encourage walking, biking, and public transit use. This type of development is designed to minimize the need for automobile travel and to create more walkable, livable communities.
Leapfrog development, commercial (strip) development, and low-density single-use development are all types of development patterns that are more likely to contribute to sprawl than high-density multi-use development.
Therefore the correct option is C.
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