A manometer is attached to a water tank as shown in the figure. Find the height of the free water surface above the bottom of the tank. 0.15m 0.15m Hgi 13.6)

For the open tank, the piezometers attached on the side, containing two different immiscible liquids, as shown in the figure, find the elevation of the liquid surface in piezometer A.

A manometer consists of a tube of 0.5 inch in the inner diameter and an amount of mercury (SG Hg =13.55). On one side of the tube, oil (SG=1.4) was trapped, a bubble formed, and the fluid inside was stationary. The volume of the oil was 0.6 in^3 and the volume of the air was 0.2 in^3. Now, the oil and bubble are removed. The pressure change across the air bubble is negligible and any curvature on the bubble surface can be neglected in calculating the volumes. Determine how much the mercury height rises (i.e. h 4 -h 2 ).