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85问答库 > 一架托盘天平的铭牌上标有“称量200g、感量0.2g”，用这架天平能否分别测出一个苹果和一枚大头针的质量？

一架托盘天平的铭牌上标有“称量200g、感量0.2g”，用这架天平能否分别测出一个苹果和一枚大头针的质量？

2025-04-07 10:37:09

推荐回答（1个）

回答1：

答：由物理知识或者自己的实践知识可知，一个苹果的质量大约是0.15kg，小于天平的称量，可以用该天平测出其质量；而一枚大头针的质量约为8×10^-5kg，小于天平的感量，故不能用此天平称出一枚大头针的质量．

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