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46+ < p > < img src ="/../images/physics/Exer9.29.jpg " loading ="lazy "> </ p >
47+ < p > < em > < strong > 双原子分子的压强公式是 $2n\bar\varepsilon_k/5$ 吗</ strong > </ em > </ p >
48+ < p > 无论分子有多少个原子，根据统计理论推算微观压强公式都应该是 $p = 2n\bar\varepsilon_t/3$ 。原因是微观压强公式只考虑平动动能，不考虑转动和振动动能（显然转动和振动不会对压强造成影响）。而 $\bar\varepsilon_k = \bar\varepsilon_t + \bar\varepsilon_r + \bar\varepsilon_v$ 。</ p >
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