Me! in which direction does the electric field point at a position directly west of a positive charge? a. west b. south c. east d. north

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

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.