Am arrow of mass 1000kg is shot into a wooden block of mass 5000lg lying at rest in a smooth surface. If the arrow travels 15m/s horizontally at the moment of impact, Calculate the common velocity after the impact

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.