A bullet of mass 5g moving at 60m/s is fires into a stationary block of wood of mass 2kg. If the bullet became embedded in the block of wood, find the velocity of the wooden block with the bullet in it.

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.

Use the illustration to describe how the electromagnetic spectrum changes as its frequency moves from radio waves to higher energy gamma waves in terms of wavelength and amplitude.