If a coin and a piece of paper are dropped simultaneously from the same height which of two will touch the ground first? what will happen if they are dropped together in vacuum

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.

What are the dimensions of the cross section that passes through the points a, f, g, and d?

Sound travels slower in colder air that it does in warmer air. make a claim about the effect of air temperature on the speed of sound. support your claim with evidence