The flashlight is slowly turned away from the vertical direction.
At what angle will the beam no longer be
visible above the surface of the pool

Match each scenario to the form of energy it represents

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force

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.