[b]1. 1) You have a brass bar and an aluminum bar which are fastened to two immovable walls and there's an air gap between them. At a certain temperature, the gap measures a certain amount. What temperature will cause the gap to close?
2) A tennis ball starts from rest rolls down a hill and...
[b]1. 2) A tennis ball starts from rest rolls down a hill and at the end of the hill becomes airborne. (diagram) Find the horizontal range that the ball drops in.
[b]2. d=v(2h/g)^.5
[b]3. How do you go about solving this problem?