25. At a distance of 50 m from a jet fighter which is in the process of take-off, the sound level is 120 dB. What is the sound level at a distance of 500 m? Assume that the jet is a point source of sound. (A) 120 dB (B) 100 dB (C) 110 dB (D) 80 dB (E) 90 dB

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.

25. At a distance of 50 m from a jet fighter which is in the process of take-off, the sound level is 120 dB. What is the sound level at a distance of 500 m? Assume that the jet is a point source of sound.

(A) 120 dB

(B) 100 dB

(C) 110 dB

(D) 80 dB

(E) 90 dB

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