On a pulley, the strings help support the weight of the object being lifted. What happens to the force as more support strands are added to the pulley? A. the force increases and the work decreases

B. the force decreases and the work is the same

C. the force decreases and the work decreases

D. the force increases and the work increases

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