The entropy of the universe
A. is always decreasing
B. is conserved
C. is impossible to calculate
D. can only increase or remain constant
D. can only increase or remain constant
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What is the troposphere?
A) the lowest layer in the atmosphere B) the part of the atmosphere that absorbs optical light C) the part of the atmosphere that absorbs ultraviolet D) the part of the atmosphere that absorbs X-rays E) the highest layer in the atmosphere
Bright and dark fringes are seen on a screen when light from a single source reaches two narrow slits a short distance apart. Each bright fringe will shift to the location of the adjacent bright fringe if a thin film is placed in front of one of the slits. The minimum width of this film must be
A.
.B.
.C.
.D.
.E.
.LHC stands for
A. Lorentz Heavy Centrifuge. B. Level Height Charges. C. Laser Hertz Catalyzer. D. Large Hadron Collider. E. None of these choices are correct.
What are the signs of Q, W, and ?U for the process 
?
A. 0, -, - B. 0, +, + C. +, -, 0 D. +, +, 0 E. -, +, 0 F. Other (specify)