Rex and Tex board the bumper cars at the local carnival. Rex and their car weigh 211 kg while Tex and his cart weigh 217 kg. Rex is moving at a full speed of 2.05 m/s when they rear-end Tex who is at rest in their path. Tex and his car lunge forward at 1.40 m/s. Determine the post-collision speed of Rex and their car.

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

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

Each neuron shown in this figure innervates a group of muscle fibers. what is the term for a group of muscle fibers innervated by a single neuron?