Which of the following is not a type of energy conversion process?
a. hydroelectric dam
c. windmills
b. solar cell
d. all are energy conversion processes

"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."

Identify some abiotic characteristics of the tundra biome.

Acorporation gives out its profits as dividends paid to whom?