A train brakes from 40 m/s to a stop over a distance of 100m, what is the accleration of train?

Which best represents the law of conservation of mass ?

While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.

The particles that are found in the nucleus of an atom are