12. A farad is the same as a:
(A) J/V
(B) V/J
(C) C/V
(D) V/C.

13. A 10-ohm resistor has a constant current. If 1200 C of charge flow through it in 4 minutes what is the value of the current? (A) 3.0 A (B) 5.0 A (C) 11 A (D) 15 A.

14. Which of the following statement is not equivalent to the second law of thermodynamics? (A) It is impossible for a heat engine that operates in a cycle to convert its heat input completely into work. (B) It is impossible for a cyclical device to transfer heat continuously from a cold body to a hot one without the input of work or other effect on the environment. (C) The change in the internal energy of the system comes from the heat input minus the work done on its surroundings. (D) The entropy change of an isolated system always stays constant or increases.

15. A cube that has sides of length L is made of a metal with a coefficient of thermal linear expansion α. What is the approximate ratio of the change in the volume to the original volume as temperature rises by ΔT? (Assume αΔT＜＜1.) (A) 3αΔT (B) 6αΔT (C) α³ΔT (D) α(1+α)²ΔT.

16. As an n-mole monatomic ideal gas with a volume V expands to 2V at a constant pressure P, what is the heat exchange from the bath to the system? (A) PV (B) -PV (C) (D).

17. A 10-g cube of ice at -10°C is put into a tank of water initially at 4°C with a volume 10 L. Suppose that the specific heat of ice is 2.1 J/gK, and water 4.2 J/gK, and the latent heat of fusion is 334 J/g. What is the approximate entropy change of the cube of ice as it reaches equilibrium with the water in the tank? (A) 1.3 J/K (B) 13 J/K (C) 65 J/K (D) 130 J/K.

18. Which of the following statement about the Carnot engine is not correct: (A) The efficiency of a Carnot engine operating between temperatures T₁ and T₂ (T₁＞T₂) is 1 − . (B) Carnot engine has the best efficiency for given two heat reservoirs. (C) The entropy of a Carnot engine during a cycle remains constant. (D) The efficiency of any reversible engine is identical to that of a Carnot engine for given two heat reservoirs.

19. The root-mean-square speed of oxygen molecules at 300K is approximately (A) 0.48 m/s (B) 4.8 m/s (C) 48 m/s (D) 480 m/s.

20. If a light is propagating with plane electromagnetic waves in vacuum, which of the following statements is incorrect? (A) The electric and magnetic fields are always perpendicular to the traveling direction. (B) The electric field is always perpendicular to the magnetic field. (C) The amplitudes of the electric and magnetic fields can be related with a constant, which is the speed of light. (D) When the amplitude of electric field reaches its maximum, the amplitude of magnetic field reaches its minimum.

21. A system of three polarizing sheets lies in the path of initially unpolarized light, which is in the z direction. The polarizing direction of the first sheet is parallel to the y axis, that of the second sheet is at an angle of 45° from the y axis, and that of the third sheet is parallel to the x axis. What fraction of the initial intensity of the light emerges from the three-sheet system? (A) 1/2 (B) 1/4 (C) 1/8 (D) 1/16.

22. Consider a classical double-split experiment, which of the following modification of configurations increases the space between bright fringes on the screen? (A) move the screen toward from the splits; (B) reduce the distance between the splits; (C) use a blue light source instead of a red one; (D) add more splits with the same spacing.

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