If water be used to construct a barometer, what would be the height of water column at standard atmospheric pressure (76 cm of mercury)?
The atmospheric pressure from a mercury column is,
. —————(1)
For water we have, —————(2)
As the atmospheric pressure should be same, (1) must be equal to (2)
(ANS)
Thus to make a barometer using water, we require the height of 10.336 m.