alleryAdiabatic bulk modulus of ideal gas equals:
AP/γ
BP
CγP
Dγ²P
Answer & Solution
Correct answer: C. γP
**For adiabatic:** dP/dV = -γP/V. So K_adia = -V × (-γP/V) = γP.
**Hence speed of sound formula uses γP/ρ (not just P/ρ).**
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