A300 g ball and a 100 g ball are dropped from a tower. both are the same size and there is no air resistance. when do they hit the ground?

a. the 100g mass hits the ground first
b. they both hit the ground at the same time
c. the 300 g mass hits the ground first

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

For this car, predict the shape of a graph that shows distance (x) versus time (t). note that time is the independent variable and will be on the bottom axis. need asap

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little