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Question

'The atmospheric pressure at a place is $$76  cm$$ of $$Hg$$? State its value in $$bar$$.


A
1.013×105 bar
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B
1bar
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C
1.013×105 bar
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D
None
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Solution

The correct option is B $$1 bar$$
$$1atm$$ is the standard atmospheric pressure. 
In terms of length of mercury it is $$76cm $$ of Hg.
In SI units, the atmospheric pressure is $$1atm=1.01325\times 10^{5}Nm^{-2}= 1 bar$$

Physics

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