Pressure in Liquids and Gases
2 marks · EasyA 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.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
The experiment shows that pressure at a point in a liquid at rest acts equally in all directions.
Also accept: Pressure does not depend on direction at a point; it is the same up, down, and sideways.
Show mark scheme and worked solution
Marking points
B1 · 1 mark · States all sensor readings were the same at a point.
B1 · 1 mark · Concludes pressure is equal in all directions at a point in a stationary liquid.
Worked solution
The same readings show that at a given point, pressure is equal in all directions in the liquid at rest.