Aplane flies for 4.2 hours at the velocity of 1250km/hr. what distance will the plane travel?

In a system, when potential energy decreases, then entropy also decreases. true false

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

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.