Pressure of water at bottom of different tanks

Description

Several containers having different sizes and shapes are filled with water. As the water is added to a tank, the pressure at the bottom of the liquid is measured and recorded as a function of volume of liquid.
The dial on the pressure sensore shows the value of air pressure (in bar = 10^5 Pa) before it is submerged in a liquid. Note how the reading goes up when more water is added to a container.