become much lighter , because


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送交者: html 于 2007-07-29, 07:54:58:

回答: 被子抽真空后变重?变轻?还是没有变化?(不计真空袋重量) 由 lbc 于 2007-07-28, 16:54:09:

the fiberis a good adsorbent with high surface area, which can adsorb a lot of moisture and heavy molecules.

The density of the adsorbed gas is 1000 higher than the free gas.





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