A bicycle travels at 3 m/s over a displacement of 2 km. The rider then changes the bike’s speed instantaneously to a new constant velocity for the next 2 km. A. If the average velocity for the entire 4 km trip is 4 m/s, determine the average velocity of this bike in the last 2 km. (HInt: it isn’t 5 m/s)! B. How much time did the entire trip take?

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.