To calculate the mechanical advantage of a lever what two pieces of information do you need?
a. effort force and fulcrum weight
b. resistance force and length of effort arm
c. effort force and the length of effort arm
d. the length of the effort arm and the length of the resistance arm

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce

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

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.