7. For an ideal gas, the difference between the molar specific heat at constant pressure and constant volume, i.e. Cp − Cv, equals to: (A) −R (B) −1/2 R (C) 1/2 R (D) R (E) 3/2 R R is the universal gas constant.

10. In an oscillating series RLC circuit with R = 50 Ω, L = 20 mH and C = 2.0 μF, the maximum charge is stored on the capacitor at t = 0. Find the time required for the charge on the capacitor falling to 37% of its initial value. (A) 1. × 10⁻⁴ s (B) 2. × 10⁻⁴ s (C) 4. × 10⁻⁴ s (D) 6. × 10⁻⁴ s (E) 8. × 10⁻⁴ s

7. For an ideal gas, the difference between the molar specific heat at constant pressure and constant volume, i.e. C_p − C_v, equals to:
(A) −R
(B) −1/2 R
(C) 1/2 R
(D) R
(E) 3/2 R R is the universal gas constant.

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