An electric refrigerator rated 400 W operates 8 hours a day. Find the energy used per day in KWh.

In a nuclear experiment a proton with kinetic energy 3.0 MeV moves in a circular path in a uniformmagnetic field. What energy must the following two particles haveif they are to circulate in the same orbit? (a) an alpha particle (q = + 2e, m = 4.

When light goes from one material into another material having a higher index of refraction, what happens to the speed of light?

What does a wave carry? go

Explain what kinesthesis is, why it is important, and how it is applied to multiple disciplines.

Listed following are three possible models for the long-term expansion (and possible contraction) of the universe in the absence of dark energy.

The engine that powers a crane burns fuel at a temperature of 1500 oC. It is cooled by air at a temperature of 20 oC. The crane is used to lift a 1000 kg steel girder 30 m into the air.

The portion of a light ray that falls on a surface is a/an

Give the definition for diffusion. (A) gas molecules mix unequally average distance between collisions (B) gas molecules escape from a container into a vacuum through a small hole (C) gas molecules mix equally (D) gas molecules spread out in a

As resistance goes up, what happens to the current?

1. A 0.828-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. a) Find the momentum of the electron. b) Find the kinetic energy of the electron.