Aball is thrown straight upward with a speed of 20 m/s. what is the velocity of the ball at the top of its path?

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible

grav potential energy

not too sure thinking all accelerations are pointed down