You can calibrate the scale with coins as well. They have a pretty well defined ... | Hacker News

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		shrx 9 days ago \| parent \| context \| favorite \| on: The Weight of a Cell You can calibrate the scale with coins as well. They have a pretty well defined mass.

esperent 9 days ago [–]

Many countries don't have coins unfortunately, including the one where I live. Also, is that true for all coins in every country?

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