A25-kg girl is bouncing on a trampoline. during a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 240 j from 430 j. how high does she rise during this interval? neglect air resistance.

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.