How is the magnitude of atmospheric pressure determined?

kaushal
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:biggrin:please tell me how it was calculated, atmospheric pressure = 760mmHg, practically and theoritically :devil:
 
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kaushal said:
:biggrin:please tell me how it was calculated, atmospheric pressure = 760mmHg, practically and theoritically :devil:

Practically.

Maybe here you can find the aswer.

http://www.usatoday.com/weather/wbaromtr.htm

Cheers.
 

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