The open tank has a four (4) liquids inside. The absolute pressure at the bottom is 250 kPa and the specific gravity of three (3) liquids oil, water, and mercury is 0.88, 1, and 13.6 respectively. The olive is one (1) of them, determine its specific gravity if the height of four (4) liquids oil, water, olive and mercury is 1.45 m, 2.45 m, 2.8 m, and 0.39 m respectively. And draw the open tank with a consecutive layer of four (4) liquids. Notes: 1. atmospheric pressure is 101.03 kPa 2. Since the tank is open, the atmospheric pressure is included.

A suspended gate that’s able to pivot from the top seperates two liquids. There is a stopper that prevents the gate opening anti-clockwise. The gate has a height of 0.5m. The liquid on the right is three times as dense as the liquid on the left. The liquid on the left has a depth of 0.3m. 1) What is the minimum depth of liquid on the right for the gate to open. 2) Comment on the ability to solve this question if the liquid on the left was 0.5m (filled to the top)