1-The position of a particle moving along the x axis is given by , where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction?

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.