Which best describes why heat pumps are reversible? They can heat and cool an indoor space.
They involve a metal expanding or contracting against another.
They combust and can also add coolant.
They allow a piston to move up and down.

Write a question about how changing temperature affects the gas inside the sports ball

How are calculation for velocity and speed different

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.