1.

_If V‚ÇÅ is the jet velocity and V‚ÇÄ is the vehicle velocity, then the propulsive efficiency of a rocket is given by$?

A. [2(V₀/V₁)]/ [1 + (V₀/V₁)²]
B. (V₀/V₁)/ [1 + (V₀/V₁)²]
C. V‚ÇÄ/(V‚ÇÄ + V‚ÇÅ)
D. V‚ÇÅ/(V‚ÇÄ + V‚ÇÅ)
Answer» B. (V‚Äö√á√Ñ/V‚Äö√á√Ö)/ [1 + (V‚Äö√á√Ñ/V‚Äö√á√Ö)¬¨‚â§]


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