Entropy: A container of ideal gas at STP undergoes an isothermal expansion and its entropy changes by 3.7 J/K. How much work does it do?
A. 0.0 J
B. 1.0 × 103 J
C. -1.0 × 103 J
D. 1.4 × 103 J
E. -1.4 × 103 J
Answer: B
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A. chromosphere; corona B. photosphere; chromosphere C. photosphere; corona D. corona; solar wind
An electron and a proton are traveling at the same speed. Which has the longer wavelength?
A) the electron B) the proton C) both the same D) none of the above
Just after a big fish swallows a small fish, the momentum of the two-fish system is
A) greater after lunch than before. B) the same before and after lunch. C) somewhat less after lunch.
As evidence for the cosmic inflation hypothesis, this hypothesis explains
A) the observed "flatness" of the overall three-dimensional universe. B) the origin of the "clumping" of matter and energy that we see today in such aggregations as stars and galaxies. C) Both of the above. D) the force of gravity. E) All of the above.