2. A ball is thrown horizontally off of a building 67 m above the ground. When the ball hits the ground, it has traveled a horizontal distance of 19 m.
Determine the speed at which the ball was moving after being thrown. Ignore air resistance and use 9.8
m/s2 for acceleration due to gravity.

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.