I need help with physics, i didn't go to school and my teacher already teaching this ​

What object a collides with object b and bounces back its final momentum is?

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.

Which of the following list the divisions of the geologic time scale in order from longest to shortest