Look at the distance-time graph for a woman walking below.

Asimply means that over time there was some sort of change.

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.

The energy of a photon is equal to (what) times (what) of the photon.