2. A 14 kg rock starting from rest free falls through a distance of 5. 0 m with no air resistance. Find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earth’s velocity. Earth’s mass is. Show all your work, assuming the rock-earth system is closed.

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b

Susie ran a race. she ran 55 miles an hour, and the race took her tt hours to complete.

Whats begin with t, ends with t has t in it