为什么冬天和夏天摆钟的摆锤摆动的快慢不一致?
为什么冬天和夏天摆钟的摆锤摆动的快慢不一致?
物理人气:519 ℃时间:2020-03-29 01:55:43
优质解答
摆绳热胀冷缩,影响摆长,进而影响周期.
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