Density and Pressure

Give one practical example, not using a can or bottle, that shows pressure in a gas acts in all directions at a point.

A diver at a certain depth in still water places a pressure sensor facing upward, downward, and sideways at the same point. The sensor gives the same reading every time. Explain what this experiment shows about the pressure in a liquid at rest.

Which observation best supports the idea that pressure in a stationary liquid acts equally in all directions at a point?

A glass tube is sealed at one end and filled with water. Three small holes are made at the same depth but on different sides of the tube.

A tank contains water to a depth of 4.0 m. The density of water is 1000 kg/m³. Take gravitational field strength g = 10 N/kg. Calculate the pressure difference between the top and the bottom of the tank.

State the equation that links pressure difference, height, density, and gravitational field strength. Explain what each symbol means.

Which change would reduce the pressure difference between two points in a liquid, all else staying the same?

A storage tank contains orange juice to a depth of 1.5 m. The density of orange juice is 1050 kg/m³. Take g = 10 N/kg.

Density of Liquids

Milk

1030 kg/m³

Kerosene

810 kg/m³

Seawater

1025 kg/m³

Which of the three liquids would create the greatest pressure at a depth of 2 m? Justify your answer.

Explain why the area of the base does not change the pressure difference between two points at different depths in a liquid.