According to the second law of thermodynamics, for any process that may occur within an isolated system, which one of the choices applies?
A)
Entropy remains constant.
B)
Entropy increases.
C)
Entropy decreases.
D)
Both A and B are possible.
E)
Both A and C are possible.
D
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Tycho Brahe's greatest contribution to astronomy was
a. his model of the universe. b. his telescopic observations. c. his discovery of three laws of motion. d. his 20 years of careful observations of the planets. e. a and b above
Examine the following figure, which demonstrates star trails that would be visible in a photo centered on the North Star (Polaris) when the camera's shutter is left open to reveal the path the stars are taking as they move during part of one night. Which of the following best describes your observations?
A. Some stars move in a counterclockwise path around Polaris, while others move in a clockwise path. B. The stars closest to Polaris move in smaller circles. C. All of the stars move in a counterclockwise path around Polaris. D. All of the stars move from east to west. E. Each star moves in a circular path of the same radius. F. All of the stars move in a clockwise path around Polaris.
Within the multidimensional integrative approach to understanding psychopathology, learned helplessness is considered a(n) _______ dimension.
Fill in the blank(s) with the appropriate word(s).
Which of these is NOT a vector quantity?
a. translational momentum b. angular momentum c. acceleration d. rotational kinetic energy e. velocity