物态变化冬天手冷时,用嘴向手上哈气,手会感到暖和；若用劲向手上吹气,收回感到冷,为什么
物态变化冬天手冷时,用嘴向手上哈气,手会感到暖和；若用劲向手上吹气,收回感到冷,为什么
其他人气：912 ℃时间：2019-09-29 03:56:20
优质解答
哈出的热气遇冷的手后液化放热,吹的气流速快,遇手后不仅来不及液化,还加速空气流动,使手上的小量液体加快蒸发吸热.
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