Which of the following is the best equation for stress?
a. reaction + stress = stressor
b. stressor + reaction = stress
c. stress + stress = reaction
d. stressor + stress = reaction
Ans: b. stressor + reaction = stress
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The daytime surface temperature of Mercury is higher than Earth's Moon's surface temperature because
a. clouds shield the Earth's Moon during the day. b. Mercury is farther from the Sun than the Earth's Moon. c. Mercury is closer to the Sun than the Earth's Moon. d. the atmosphere of the Earth's Moon has a strong greenhouse effect.
Shell Radius: Which of the following statements are true for the Bohr model of the atom? (There could be more than one correct choice.)
A. The spacing between all the electron shells is the same. B. The energy difference between all the electron shells is the same. C. As we look at higher and higher electron shells, they get closer and closer together, but the difference in energy between them gets greater and greater. D. As we look at higher and higher electron shells, they get farther and farther apart, but the difference in energy between them gets smaller and smaller. E. There is no general pattern in the spacing of the shells or their energy differences.
A nuclear reaction, which gives off a total of 1.2 × 10^17 J of energy, expends how much mass in the process? (c = 3.00 × 10^8 m/s)
a. 0.1 kg b. 1.3 kg c. 4.0 kg d. 13.3 kg e. 7.5 kg
Which of the following would make the demonstration illustrated in this figure function less effectively?
a. Use a piece of cardboard with a greater mass. b. Use a piece of cardboard with a greater radius. c. Use a piece of cardboard with less mass and smaller radius. d. Use a thinner pencil. e. Use a thicker pencil.