A ball is thrown from the top of one building 83m high toward a tall building 40 meters away. The initial velocity of the ball is 16 m/s at 35 degrees above the horizontal. How high above the ground will the ball the strike the opposite wall?

What is the role of the ocular lens?

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space? the cloud is extremely hot. the cloud is visible primarily because it reflects light from nearby stars. the cloud is cool and lies between you and a hot star. the cloud is cool and very dense, so that you cannot see any objects that lie behind it.