Apiston above a liquid in a closed container has an area of 1m2. the piston carries a load of 350 kg. what will be the external pressure on the upper surface of the liquid?

a. 27.3 kpa
b. 3.43 kpa
c. 4.90 kpa
d. 68.6 kpa

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.