Question

What is the barometric \((\text {in}~cm)\) of a liquid of density \(3.4~gcm^{-3}\) at a place where that for ercury barometer is \(70~cm\)?Density of mercury \(=13.6~g/cm^3\).

Answer 1

Formula Used: \(P=\rho gh\)
Given,
\(\rho_L=3.4~gcm^{-3}\\
\rho_m=13.6~g/cm^3\\
h=70~cm\)
Pressure at height \(h\)
\(P=\rho gh\\
\rho h=\text {constant}\\
3.4h=13.6\times 70\\
\Rightarrow h=280~cm\)

Final Answer: (280 cm)