It requires 1250 J of work to lift a car high enough to change a tire. How much work must done by the person operating the lift if the car jack is 45% efficient?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

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

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig