You are traveling to san francisco (90 miles) and it takes you 2.5 to get there. what was your average speed?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

What are the necessary conditions for fusion?

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.