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What is the unit of specific impulse?

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+2 votes
in Fluid Mechanics by (118k points)
What is the unit of specific impulse?

(a) m/s

(b) m^2/s

(c) m^3/s

(d) m/s^2

I had been asked this question during an internship interview.

I'm obligated to ask this question of Impulse Momentum Equation in chapter Fluid Dynamics of Fluid Mechanics

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The correct answer is (a) m/s

For explanation: Specific impulse is equal to the exhaust velocity of the fluid. Since, the unit of exhaust velocity is m/s, the unit of specific impulse is also the same. It is used to measure the efficacy of rocket propellants.

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