In what direction does your brain see light as traveling when it reflects off an object?
a. in a straight line
b. in a wavy line
c. in an s-shaped line
d. in a curved line

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

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