In a pool game, the cue ball, which has an initial speed of 3.0 m/s, make an elastic collision with the eight ball, which is initially at rest. after the collision, the eight ball moves at an angle of 40° to the original direction of the cue ball. (a) find the direction of motion of the cue ball after the collision. ° (from the original line of motion) (b) find the speed of each ball. assume that the balls have equal mass. m/s (cue ball) m/s (eight ball)

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.