A300 g ball and a 100 g ball are dropped from a tower. both balls are the same size and there is no air resistance. which one hits the ground first?

If there is no air resistance, then both of those balls ... as well as a feather, a piece of paper, a handkerchief, a bowling ball, a fried egg, a hammer, a car, a school bus, an airplane, a diesel locomotive, a computer, and a battleship ... if dropped at the same time from the same height, fall together, and hit the ground at the same time.  We've known this for about 400 years, since Galileo.

depends on what you mean by "group." for order, it would be coleoptera (beetles). for class, it would be insecta (insects). for phylum, it would be the arthropoda (animals with jointed exoskeletons).

explanation: