A motorboat is crossing a large river. The boat's motor normally gives it a speed of 7 m/s in calm waters, but the river itself is flowing at a speed of 3 m/s. If the boat is angled perpendicular to the direction of the current, what is the overall speed of the boat?​

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.