Which of the following is a science? Physics
Astrology
Football statistics
Language studies

Which type of wave can travel without a medium

"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."

If a simple machine reduces the strength of a force, what must be increased?