What is one way to increase the amplitude if a wave in a medium?
A. By applying a vibration at the natural frequency of the medium
B. By increasing the velocity of the wave source
C. By moving the source of the wave away from the receptor or observer
D. By increasing the frequency of the wave source

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.