06/03/22

A hypothetical material has a relative permeability and relative permittivity of 3.0 and 4.0, respectively.

A hypothetical material has a relative permeability and relative permittivity of 3.0 and 4.0, respectively. a. What is the speed of light in this material? b. What is the value of the magnetic... more
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06/01/22

Gravitational Slingshot
A satellite of mass ms and speed vs,i circles around a planet of mass mp that is moving with speed vp,i in the opposite direction.Since gravity is a conservative force, the collision is... more
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05/31/22

Please help me understand
Can you explain or give an example of why the frequency of light does not change upon reflection
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05/24/22

potential energy
A particle of mass 1.1 kg moves under the influence of a potentialU(x) = a/x + bx (a=3 and b=2.5). The particle's motion is restricted to the region x>0.the force acting on the particle is a/x^2... more
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05/21/22

What type of reflection does fiber optic technology rely upon?
Total Internal ReflectionRetrereflectionRegularDiffuse
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05/21/22

The fact that emf's are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work?
A. Faraday's LawB. Lenz's LawC. Magnetic FluxD. Electric Flux
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04/24/22

Linear velocity problem
The diameter of the back wheel of a tricycle is 1.5 times longer than the front wheel's diameter. When the tricycle is moving, the surface points of the back wheel move with the linear velocity of... more
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01/06/22

The question is about the radioactive decay for AP Physics 2 students.
What are alfa, beta and gamma particles. Why their penetration abilities are different?
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01/06/22

Why is everything in our universe spherical? From electrons to the sun we see everything spherical around us..
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01/06/22

What are Alpha particles, Beta particles, and Gamma particles?
And can someone help me differentiate them? Thanks in advance.
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01/04/22

Can we represent energy negative?
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01/02/22

Will someone please help me with this physics questions.

A 1,000 kg car is traveling at 20 m/s. The driver applies the brakes over a 10 s time period. What is the magnitude of the braking force?a. 1000 Nb. 4000 Nc. 3000 Nd. 2000 NA moving billiard ball... more
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01/02/22

Will someone please help me with these Physics questions.

Which of the following best describes the momentum of two bodies after a two-body collision if the kinetic energy of the system is conserved?a. must be lessb. it will be doublec. must also be... more
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01/01/22

A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be (g=10ms −2 )
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01/01/22

Nuclear Physics
A certain isotope has a half-life of 8 days. What fraction of the original sample would remain at the end of 64 days?64/8 = 81/2^8 = 1/256Is my solution correct?
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12/29/21

What is the area of a triangle with sides measuring 6.8 cm, 6 cm and 8.8 cm? Round to the nearest tenth.
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12/28/21

PHYSICS DOUBT- Isaac Newton's 3rd law of motion.

Sir Isaac Newton's third law of motion states that to every action there is an equal and opposite reaction, and it happens in 2 different bodies and not the same body, so if the action and reaction... more
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12/28/21

Physics Help Please
A man uses a rock as a fulcrum and lifts a 300-kg boulder with a metal bar 6.00 m long. Calculare the force necessary to lift the boulder if the fulcrum is:(a) 1.00 m from where the bar contacts... more
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12/26/21

A progressive wave equation is given by y (x,t) = 5 sin (2πt + πx), where x and y is in meter (m) and t is in second(s)
Determine the period of the wave.(2 marks)Calculate the wavelength during one complete cycle.(2 marks)Find the magnitude of wave velocity.
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12/20/21

A projectile is fired upward from the ground with an initial velocity of 300 feet per second.
A projectile is fired upward from the ground with an initial velocity of 300 feet per second. Neglecting air resistance, the height of the projectile at any time t can be described by the... more
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12/20/21

Find the force P.
A force P is applied to a string wrapped around the outer disk of a double pulley (mlarge = 5 kg, rlarge = 0.5 m, msmall = 2 kg, rsmall = 0.3m). A string is wrapped around the inner disk with a 2... more
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12/18/21

Two homogeneous rods are attached to the disk with a radius of 10cm,as in the figure, and the system can rotate freely araound the disk center...
Two homogeneous rods are attached to the disk with a radius of 10cm,as in the figure, and the system can rotate freely araound the disk center. The mass of the disk is 800 grams and that of the... more
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12/17/21

To avoid an accident a driver steps on the brakes to stop a 1000-kg car travelling at 65 km/h. The braking distance is 35 m, how much force is necessary to stop the car?
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12/17/21

The Problem on Projectile Motion for AP Physics 1 and AP Physics C students
The rocket is fired with a muzzle velocity of 98 m/s at an angle of 52°. After firing, the rocket accelerates with a = 28 m / s2 within 5 s and moves along a straight line. The rest of... more
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12/16/21

 An elevator accelerates upward in 3.40 s to a final speed of 7.40 m/s. 
 An elevator accelerates upward in 3.40 s to a final speed of 7.40 m/s. A 56.0 kg person is standing on a bathroom scale in the elevator. Determine the apparent weight of the passenger.
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