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为什么用棉被盖冰棍冰棍不化
更新时间: 2020-09-19 00:00:00  

热量从温度高的物体传到温度低的物体,或者从物体的高温部分传到低温部分,这种现象叫做热传递,发生热传递的唯一条件是存在温度差,用棉被盖住冰棍就是为了阻止热平衡交换,你用保温瓶保存冰块也是一样的道理保温是阻止内部热量向外传播,保冷是阻止外部热量向内传播棉被就充当了一个隔热层的作用。

关键词: 为什么 棉被 冰棍

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