From the Water in each of the next move

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

"an open tank has the shape of a right circular cone. the tank is 6 feet across the top and 5 feet high. how much work is done in emptying the tank by pumping the water over the top edge? note: the density of water is 62.4 lbs per cubic foot."

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?