Torricelli’s barometer used mercury. Pascal duplicated it using French wine of density 984 kg/m3. Determine the height of wine column for normal atmospheric pressure.
Density of wine = 984 kg/m3
Now, according to Pascal's law, we have
Pressure due to height column of liquid is,
The normal atmospheric pressure is 760 mm og Hg.
If h' is the height column of wine corresponding to one atmospheric pressure, then
where is the density of the wire.
Now from equations (1) ad (2), we get
is the height of wine column for normal atmospheric pressure.