Which element is used to define atomic time?
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Replying to @brazen_cabeza
Are you talking about watches? They use quartz, which is a molecule, not an element
1 reply 0 retweets 1 like -
Replying to @AMK2934
Watches had value to my father’s generation. They bought expensive instruments to wear on their wrists to demonstrate their power.
1 reply 0 retweets 0 likes
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