Your partner has been working on your group's circuit and has left the work area. before you begin working on the circuit, what should you do to ensure that the circuit is not active and prevent yourself from getting a shock?

Suppose that a cylindrical tank 6 meters high with a radius of 2 meters is filled to the rim with water. the tank is buried so that the top of the tank is 1 meter below ground level. the space above the tank is not filled with water. calculate how much work needs to be done by a pump to pump the water out of the tank up to ground level. (the water weighs 9,800 newtons per cubic meter.)