An atom is the most unit of living and nonliving things. basic complex interesting sizeable

Carbon 14 is a naturally occurring stable

The substances that are necessary for producing of certain hormones and that store and transport vitamins

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.