A stunt performer falls off a wall that is 1.6 m high and then lands on a mat. What is his impact velocity?
A. 5.6 m/s
B. 1.1 m/s
C. 4.7 m/s
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D. 2.9 m/s

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

Which transition by an electron will release the greatest amount of energy? oa ob oc od