5. A battery has an emf of 15.0 V. The terminal voltage of the battery is 11.6 V when it is delivering 20.0 W of power to an external load resistor R. What is the internal resistance of the battery? (A) 4.97 Ω (B) 3.97 Ω (C) 2.97 Ω (D) 1.97 Ω (E) 0.97 Ω

2. The first stage of a Saturn V space vehicle consumes fuel and oxidizer at the rate of 1.50 × 10⁴ kg/s, with an exhaust speed of 2.60 × 10³ m/s. What is the acceleration of the vehicle just as it vertically lifts off the launch pad on the Earth if the vehicle's initial mass is 3.00 × 10⁶ kg? (A) 7.40 m/s² (B) 5.37 m/s² (C) 3.20 m/s² (D) 1.48 m/s² (E) None of the above is correct.

5. A battery has an emf of 15.0 V. The terminal voltage of the battery is 11.6 V when it is delivering 20.0 W of power to an external load resistor R. What is the internal resistance of the battery?
(A) 4.97 Ω
(B) 3.97 Ω
(C) 2.97 Ω
(D) 1.97 Ω
(E) 0.97 Ω

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