19 and 20 plz help physics 15 points

An object has a weight of 500 on earth what is the mass of this object

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

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.