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May 29, 2015

Homework Help: Physics

Posted by Supaman on Friday, February 15, 2008 at 5:42am.

The international standard Kilogram in Paris is stored under double bell jars. What is the prupose of the jars?

Is it because the jars create a vacuum to prevent the standard from gaining mass due to oxidation? If so, why double jars? Are there any other reasons?

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