Water enters a shower head through a pipe of radius 0.00712 m
at 4.25 m/s. How much time does
it take for 1.00 m^3 of water to flow
through the pipe?
(Unit = s)

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.