A child swinging on a swing stands up. Then the time period of the swing will. ? 1 : increase 2 : decrease 3 : remain the same 4 : increase, if the child is tall and decreases if the child is short.

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)