What is the voltage drop across the 20.0 resistor?

Alexander calder's mobiles are an example of motion because it uses forces of wind and water.

The consumption of fossil fuels could be

"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."