Asked by Mikal
what is the purpose of the double bell jars that surround the international prototype of the kilogram in Paris?
Answers
Answered by
bobpursley
Isn't it to keep the air out and reduce the chance of oxidation?
Answered by
Mikal
Is there a vacuum under the jars or is it just been air sealed with air already under it?
Answered by
bobpursley
There is a vacumn.
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