10. An ideal monatomic gas at room temperature is adiabatically decompressed so that the final volume is 8 times the original. What's the final temperature?

(A)55 K

(B)75 K

(C)150 K

(D)85 K

(E)100 K

11. How long would it take for a 1000 W heater to melt 1.00 kg of ice at −20.0°C, assuming all the energy from the heater is absorbed by the ice?(A)4.18 s(B)41.8 s(C)5.55 min(D)6.25 min(E)38.4 min

12. The units of \( \frac{1}{4\pi\varepsilon_0} \) are:(A)\( N^2 \cdot C^2 \)(B)\( N \cdot m/C \)(C)\( N^2 \cdot m^2/C^2 \)(D)\( N \cdot m^2/C^2 \)(E)\( m^2/C^2 \)

13. A hollow metal sphere is charged to a potential V. The potential at its center is(A)V(B)0(C)−V(D)2V(E)πV

14. A charge Q is located at the center of a cube of edge L, and six other identical charged q are positioned symmetrically around Q as shown in Figure. What's the electric flux through one face of the cube?(A)\( \frac{Q+6|q|}{6\varepsilon_0} \)(B)\( \frac{Q+6|q|}{\varepsilon_0} \)(C)\( \frac{Q-6|q|}{\varepsilon_0} \)(D)\( \frac{Q-6|q|}{4\varepsilon_0} \)(E)\( \frac{Q-6|q|}{6\varepsilon_0} \)

15. Copper contains \( 8.4 \times 10^{28} \) free electrons/m³. A copper wire of cross-section area 1m² carries a current of 1A. The electron drift speed is approximately:(A)1 m/s(B)\( 10^{-4} \) m/s(C)\( 10^{-11} \) m/s(D)\( 10^8 \) m/s(E)\( 10^3 \) m/s

16. Which of the following describes the Faraday's law?(A)\( \oint \vec{B} \cdot d\vec{l} = \mu_0 I \)(B)\( \oint \vec{E} \cdot d\vec{l} = -\frac{\partial \Phi_B}{\partial t} \)(C)\( \oint \vec{E} \cdot d\vec{A} = 0 \)(D)\( \oint \vec{B} \cdot d\vec{A} = 0 \)(E)\( \oint \vec{B} \cdot d\vec{l} = \mu_0\varepsilon_0\frac{d\Phi_E}{dt} \)

17. Rank the electric potentials at points a, b, c, d, and e from highest to lowest, as shown below, noting any cases of equality in the ranking. All the resistors have equal resistance.(A)d ＞ a ＞ b = c ＞ e(B)a ＞ b ＞ d = c ＞ e(C)a ＞ d ＞ b = c = e(D)a ＞ d ＞ b = c ＞ e(E)a ＞ b ＞ d ＞ c ＞ e

18. What's the angular frequency of resonance of a series LC circuit?(A)(B)(C)LC(D)(E)

19. Assume you charge a plastic stick by rubbing it with fur and then hold the stick next to a bar magnet. Do the electric and magnetic fields produced constitute an electromagnetic wave?(A)Yes they do, necessarily.(B)Yes they do because charged particles are moving inside the bar magnet.(C)They can, but only if the electric field of the comb and the magnetic field of the magnet are perpendicular.(D)They can, but only if both the comb and the magnet are moving.(E)They can, if either the comb or the magnet or both are accelerating.

20. A sodium surface is illuminated with light having a wavelength of 300 nm. The work function for sodium metal is 2.46 eV. What's the maximum kinetic energy of the ejected photoelectrons?(A)1.67 eV(B)3.34 eV(C)5.01 eV(D)2.14 eV(E)4.28 eV

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