6. If Kevin is on a skate board and pushes off of a wall with a force of 100 N, what should happen?
(10 Points)
the wall should be pushed back by Kevin
the wall should push back on Kevin with more force
the wall should push back on Kevin with the same force
the wall should push back on Kevin with less force

If forces acting on an object are unbalanced. true or false

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

Adolphin emits ultrasound at 100khz and uses the timing of reflections to determine the position of objects in the water. part a what is the wavelength of this ultrasound? assume that temperature of water is 20 degrees c. answer in cm