Suppose galileo dropped a lead ball (100 kilograms) and a glass ball (1 kilogram) from the leaning tower of pisa. which one hit the ground first? (assume that there is no air resistance.)

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