An 80-kilogram cliff diver is standing on a cliff that is30 meters high. a. What it the potential energy of the cliff diver?

b. The diver makes his dive. What is his potential energywhen he is 10 meters above the water surface?

c. What is the kinetic energy of the diver when he istraveling at 19.6 m/s during his dive?

d. What is the potential energy of the diver when he istraveling at 19.6 m/s?

Which type of current is produced by a wire breaking magnetic field lines and changing the polarity? a. alternating b. direct c. straight d. alternating and direct

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.

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?