During energy transformation, all energy systems: are a. 100 percent efficient b. lose energy c. gain heat energy d. create energy

"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."

Sound is a disturbance that travels through a medium as a

What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.