The law of gravitation was mathematically defined by who?

What happens in a global convection cell

"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."

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.