Question

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

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

Answer 1

The correct option is A $1.013\times {10}^5$ $Pa$

In SI unit
$P=\rho gh$
$P=13594kg/m^3\times 9.8m/se{c}^2\times 0.76m$
$P=1.013\times {10}^{5}Pa$