Three displacements are a=200 m due south, b=250 m due west, and c= 150 m at 30.0° east of north. (a) construct a separate diagram for each of the following possible ways of adding these vectors: r1 = a+b+c ; r2 = b+c+a ; r3 = c+b+a. (b) explain what you can conclude from comparing the diagrams.

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.