a girl is watching a plane fly tells her friend that plan isn't moving at all. describe a frame of reference in which the girl's description would be true.

Which transition by an electron will release the greatest amount of energy? oa ob oc od

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.

Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.