Plzz me which best compares a brush and a commutator in an electric motor? a) both rotate when the motor is on. b) both carry electrical current from a power source. c) both remain stationary when the motor is on. d) both have a permanent magnetic field.

Why is metal often used for cooking pan?

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

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.