p778227 p778227
  • 26-09-2017
  • Physics
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how to make the air lighter?

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sirdavidcopperfield
sirdavidcopperfield sirdavidcopperfield
  • 26-09-2017
By warming it to a higher temperature ..
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p776812 p776812
  • 26-09-2017
Coldening it  more
.....
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