If the earth was tilted at 45 degrees, at what latitude would the sun be directly overhead on the solstices and equinoxes?

The dot diagram represents the motion of the motorcycle as it moves from left to right

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.

What describes the particles in a liquid