A reversible engine is one that
A. generates no net heat.
B. does no net work.
C. acts as a refrigerator.
D. causes no increase in net entropy.
Answer: D
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An innovative physics professor conducts laboratory exercises in the college swimming pool. Suppose that one exercise was the measurement of the degree of polarization by bouncing laser light off the vertically-oriented transparent polycarbonate side wall of the pool. The laser is shone on the pool wall at an angle of 42 degrees with respect to the vertical, and at that angle the reflected ray is perfectly polarized. What is the index of refraction of the material? It will help to recall that the index of refraction of water is 1.33.
A. 1.11 B. 1.28 C. 1.20 D. 1.48
A jack system will increase the potential energy of a heavy load by no more than 1000 J with a work input of 2000 J. The efficiency of the jack system is at most
A) 10%. B) 20%. C) 50%. D) 80%. E) not enough information
Which of the following is not a characteristic of clastic sedimentary rock?
A) They are composed of small pieces of weathered rock. B) They are classified by particle size. C) They are created by precipitation. D) They may contain organic matter.
If CP for an ideal gas is 35.4 J/mol/K, which of the following is CV for this gas?
a. 12.5 J/mol/K b. 20.8 J/mol/K c. 29.1 J/mol/K d. 27.1 J/mol/K e. 43.4 J/mol/K