Which of the following describes a difference between electromagnetic and mechanical waves? a only mechanical waves have long wavelengths

b only mechanical waves require a medium to travel

c only electromagnetic waves have a range of frequencies

d only electromagnetic waves transfer energy from one place to another

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.

Diamond will scratch quartz. true or false