A young man exerted a force of 9000N on a stalled car but was unable to move it. How much work was done?

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.

What is the single most important equation in all of physics?

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?