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The thrust developed by a rocket-motor i...

The thrust developed by a rocket-motor is given by `F= mv + A(P_1 -P_2)` where m is the mass of the gas ejected per unit time, v is velocity of the gas, A is area of cross-section of the nozzle, `P_1` and `P_2` are the pressures of the exhaust gas and surrounding atmosphere. The formula is dimensionally

A

Correct

B

Wrong

C

Some time wrong, sometimes correct

D

Data is not adequate

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