An object's speed in a particular direction is called its

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

If a simple machine reduces the strength of a force, what must be increased?

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.