The diagram shows an LED light bulb. 80 W of input power
7.5 W of light power
0.5 W of heat power
Which expression gives the efficiency of the bulb?

The diagram shows a person using a piece of gym equipment to lift weight which best describe the body in terms of simple machine

Suppose that recording station n is located 200 km north of the epicenter of an earthquake, and recording station s is located 100 km south of the epicenter of the same earthquake. which of the following statements would be true?

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)