Question

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

• A. $1.013\times {10}^5$ $bar$
• B. $1bar$
• C. $1.013\times {10}^{-5}$ $bar$
• D. None

Answer 1

The correct option is B $1bar$

$1atm$ is the standard atmospheric pressure.
In terms of length of mercury it is $76cm$ of Hg.

In SI units, the atmospheric pressure is $1atm=1.01325\times {10}^{5}N{m}^{-2}=1bar$