The height of the ceiling in a typical home, apartment, or dorm room is closest to
A) 100 cm.
B) 200 cm.
C) 400 cm.
D) 500 cm.
B
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What happens when an electron in an atom absorbs a photon?
A. The electron moves to the nucleus. B. The electron moves to a lower energy level. C. The electron turns into a proton. D. The electron moves to a higher energy level.
In a thermally insulated kitchen, an ordinary refrigerator is turned on and its door is left open. The temperature of the room:
A. remains constant according to the first law of thermodynamics B. increases according to the first law of thermodynamics C. decreases according to the first law of thermodynamics D. remains constant according to the second law of thermodynamics E. increases according to the second law of thermodynamics
In typical calorimetry problems, what is the usual conservation law being used?
a. energy b. heat c. temperature d. None since nothing is being conserved.
In mechanics, physicists use three basic quantities to derive additional quantities. Mass is one of the three quantities. What are the other two?
a. length and force c. length and time b. power and force d. force and time