天气预报 > 其他 > 为什么空气的密度越小声速越大
为什么空气的密度越小声速越大
更新时间: 2020-07-03 00:00:00  

原因:由于声音在传播的过程中,要受到空气的阻力,而当温度升高时,气体受热膨胀,根据密度公式,质量不变时,体积变大,密度变小了,再由压强的公式可知,此时大气压变小.所以对声音传播的阻力大大减弱,声速就变快了。

关键词: 为什么 空气 密度 声速

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