Toricelli’s barometer used mercury. Pascal duplicated it using French wine of density $984 \;kg m^{-3}$. Determine the height (in $m$) of the wine column for normal atmospheric pressure.
$10.5$
$8.4$
$12.6$
$15.8$
Who devised for first time, a method for measuring atmospheric pressure ?
Two identical cylindrical vessels with their bases at same level, each contains a liquid of density $d$ . The height of the liquid in one vessel is $ h_1$ and that in the other vessel is $h_2$ . The area of either base is $A$ . The work done by gravity in equalizing the levels when the two vessels are connected is
The height to which a cylindrical vessel be filled with a homogeneous liquid, to make the average force with which the liquid presses the side of the vessel equal to the force exerted by the liquid on the bottom of the vessel, is equal to
Discuss the variation of pressure with depth or pressure produced due to fluid depth $\mathrm{h}$ and density of fluid $\rho $.
What are difficulties arised by using water in a barometer instead of mercury ?