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7. The pressure and density of a diatomic gas (γ=7/5)  change adiabatically from (P, d) to (P’, d’). If (d’/d)=32 , then P’/P  should be

(a)  1/128                                (b)  32

(c)   128                                    (d)  None of the above

Answer-c

(7)

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