A violation of the second law of thermodynamics would occur if
a. a ball lying on the ground started to bounce.
b. transfer of energy by heat moved energy from an object at low temperature to an object at a higher temperature.
c. a refrigerator heated the air in the room in which the refrigerator is located.
d. any of the above occurred.
e. (a) or (b) occurred, but not (c).
e
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FM radio only operates in the frequency range 88 MHz to 108 MHz because
a. higher or lower frequencies are blocked by the ionosphere b. higher and lower frequencies are not radio waves c. the government set those limits d. none of the above
The chlorine atoms on PVC polymer LCMs increase the amount of _________-dipole bonding between LCMs.
Fill in the blank(s) with the appropriate word(s).
The free-fall contraction of a molecular cloud
a. can be initiated by shock waves from supernovae. b. can be initiated by nearby spectral type G stars. c. can be initiated by the rotation of the cloud. d. causes the cloud to become transparent to ultraviolet radiation. e. causes the particles in the cloud to decrease the speed with which they move.
A ball is dropped from a rooftop of a building and falls for two seconds. The acceleration of gravity is 9.8 m/s2 . The ball is referred to at the two-second time. The ball is referred to at the two-second time. The distance below the rooftop is __________
Fill in the blank(s) with correct word