A u-shaped tube open to air at both ends contains some mercury. A quantity of water is carefully poured into the left arm of the tube until the vertical height of water is 15 cm.
(a)What is the gauge pressure at the water-mercury interface?[ans 1.47*10^3Pa]
(b)calculate the vertical distance h from the top of the mercury in the right-hand arm of the tube to the top of the water in the left-arm.[ans 13.9 cm]
The Attempt at a Solution
(a) p=p_0 +rho*g*h
p = 0 + 13.6*10^3 *9.8*0.15