Aperson jumps off a diving board 5.0 m above the water's surface into a deep pool. the person's downward motion stops 2.2 m below the surface of the water. calculate the speed of the diver just before striking the water, in m/s (ignore air friction).

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?