A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5.0 cos (pt). The magnitude of the acceleration (in m/s2) of the body at t = 1.0 s is approximately
a. 3.5
b. 49
c. 14
d. 43
e. 4.3
B
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The internal energy of air can be increased by
a. compressing it. b. allowing heat to flow into it. c. lifting it. d. allowing it to expand.
How many moles of air must escape from a 10 m × 8.0 m × 5.0 m room when the temperature is raised from 0°C to 10°C? Assume the pressure remains unchanged at one atmosphere while the room is heated
a. 1.3 × 10^3 moles c. 6.5 × 10^2 moles b. 1.2 × 10^3 moles d. 3.7 × 10^2 moles
A shear strain causes changes in _____________in a specimen
Fill in the blank(s) with the appropriate word(s).
The terrestrial planets, ranked in order of decreasing atmospheric density, are
a. Venus, Earth, Mars, Mercury b. Venus, Mars, Earth, Mercury c. Mercury, Mars, Earth, Venus d. Mars, Venus, Mercury, Earth