What type of wave would a vibrating bell make?

What is the radius of the circular path ofa charged particle in a magnetic field?

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration