Jesse wants to know how well a particular brand of car wax protects his car from dirt. which of the following is a variable that must be kept constant?
a. the use of the car wax
b. how dirty the car gets
c. the kind of car

"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."

What occurs during a combustion reaction

To fully describe the photoelectric effect, scientists must consider which of the following to be quantized? o a. both light and matter o b. matter only o c. light only o d. neither light nor matter