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Author Topic: A helium balloon floats...it is lighter then air and a vacuum is lighter then He  (Read 7675 times)

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Offline IanB

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Re: A helium balloon floats...it is lighter then air and a vacuum is lighter then He
« Reply #50 on: May 02, 2019, 02:44:57 am »
If you work out how much all the air in a typical room weighs, the answer is surprising.
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Offline BeaminTopic starter

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Re: A helium balloon floats...it is lighter then air and a vacuum is lighter then He
« Reply #51 on: May 03, 2019, 05:35:36 pm »
Quote from: IanB on May 02, 2019, 02:44:57 am
If you work out how much all the air in a typical room weighs, the answer is surprising.


pv=nRT = a lot. When they make precision weights they have to account for the volume and the air pressure it takes up.
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