Consider two ideal diatomic gases \( A \) and \( B \) at some temperature \( T \). Molecules of ....

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Consider two ideal diatomic gases \( A \) and \( B \) at some
\( \mathrm{P} \)
temperature \( T \). Molecules of the gas \( A \) are rigid, and have a mass \( \mathrm{m} \) Molecules of the gas \( B \) have an additional vibrational mode, and have a mass \( \frac{m}{4} \) The ratio of the specific heats \( \left(C_{V}^{A}\right. \) and \( \left.C_{V}^{B}\right) \) of gas \( A \) and \( B \). respectively is:
(1) \( 7: 9 \)
(2) \( 5: 9 \)
(3) \( 3: 5 \)
(4) \( 5: 7 \)


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