An open U-tube contains mercury. When 13.6 cm of water is poured into one of the arms of the tube, then the mercury rise in the other arm from its initial level is
1. 1cm.
2. 0.5cm
3. 10cm.
4. 5cm
A simple U tube contains mercury to the same level in both of its arms. If water is poured to a height of 13.6 cm in one arm, how much will be the rise in mercury level in other arm? Density of mercury 13.6×103kg/m3 and density of water = 1000kg/m3.