Astudent drops a rock from the top of a cliff such that rock falls downward toward earths surface in the absence of air resistance. the downward direction is considered to be the positive direction. the graph shows the rock’s velocity as a function of time. which of the following methods should be used to determine the total distance traveled by the rock after 4 s?

What are segments of dna that code for a particular trait. a combination of dna and proteins make up what

Which transition by an electron will release the greatest amount of energy? oa ob oc od

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