Question

Torricelli's barometer used mercury. Pascal duplicated it using French wine of density $984kgm^{- 3}$ . The height of the wine column for normal atmospheric pressure is

• A. $\text{10} \text{.5 m}$
• B. $\text{6} \text{.58 m}$
• C. $\text{7} \text{.50 m}$
• D. $\text{10} \text{.8 m}$

Answer 1

Answer: (A)

Normal atmospheric pressure, $P=1.013\times 10^{5}Nm^{- 2}$
Let h be the height of the wine column. Then,
$P=h\rho g$
Or $h=\frac{P}{\rho g}=\frac{1.013 \times 10^{5}}{984 \times 9.8}=10.5 \, m$