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一平面简谐机械波在媒质中传播时，若一媒质质元在t时刻的波的能量是10J，则在（t+T）（T为波的周期）时刻该媒质质元的振动动能是：（）
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一平面简谐机械波在媒质中传播时，若一媒质质元在t时刻的波的能量是10J，则在（t+T）（T为波的周期）时刻该媒质质元的振动动能是：（）
A、10J
B、5J
C、2.5J
时间：2021-12-27 18:44
关键词：
普通物理
一级结构工程师基础知识
第二章普通物理
岩土工程基础知识
答案解析
B
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