Q. A rocket has an initial mass of 150 kg. After operating for a duration of 10 s, its final mass is 50 kg. If the acceleration due to gravity is 9.81 m/s2 and the thrust produced by the rocket is 19.62 kN, the specific impulse of the rocket is
(A) 400 s
(B) 300 s
(C) 200 s
(D) 100 s
Ans: 200 s
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