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Physics
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How are the momentum and kinetic energy of an object related?

The momentum of an object is given by p = mv, where p = momentum, m = mass of object and v = velocity.The kinetic energy of an object is given by KE = 1/2 * mv2 where KE is the kinetic...

Answered by Ketan C. Physics tutor
1362 Views

What does the photoelectric effect demonstrate?

The dual nature of light. Sometimes it behaves as a particle, sometimes as a wave.

Answered by Dario M. Physics tutor
1405 Views

When light above the threshold frequency of a metal is shone on the metal, photoelectrons are emitted. If the power of the light halves, are the maximum kinetic energy of the photoelectrons and/or the number of photoelectrons altered, and if so, how?

When the power of the light is halved, there are half as many photons per unit time. Therefore, the number of photoelectrons emitted is also halved. The maximum kinetic energy of the photoelectrons depend...

Answered by Sam S. Physics tutor
1388 Views

Describe an experiment, using a pendulum, which can be conducted to investigate g, acceleration due to gravity.

Set up a clamp stand with pendulum bob hanging from a thread attached to the top of the clamp stand. Set up a protractor where the thread is attached to the stand. Set up a fiduciary marker as a point of ...

Answered by Ilyas S. Physics tutor
2871 Views

Is the excitation and de-excitation of an electron from the ground state (of an atom) due to the collision of another particle (e.g. electron) an elastic collision or an inelastic collision.

It is an elastic collision. This is because, when a particle collides with the electron of an atom, a discrete amount of energy is transferred from the particle to the electron. This discrete amount of en...

Answered by Akthar Hussain M. Physics tutor
1750 Views

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