Darrell is trying to remove a nail from a board using the claw of a hammer, but the nail is stuck. which of the following could darrell do to make the job easier? a. use a hammer with a longer handle. b. use a heavier hammer. c. use a hammer with a shorter handle. d. use a hammer with a sharper claw.

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.)