Air pressure question for two different water columns

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SUMMARY

The discussion centers on the behavior of pressure sensors in two closed containers with differing air volumes submerged in water. The pressure sensor in the container with less air volume (right) will read a higher pressure than the sensor in the container with more air volume (left). This occurs because the gas pressure in the right container is able to exert greater force on the water column, pushing it further downwards. The conclusion is that pressure readings will not be identical due to the differences in air volume affecting the pressure exerted on the liquid surface.

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  • Understanding of basic fluid mechanics
  • Knowledge of pressure measurement techniques
  • Familiarity with gas laws, particularly Boyle's Law
  • Experience with pressure sensors and their applications
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  • Learn about Boyle's Law and its implications in closed systems
  • Explore the functionality and calibration of pressure sensors
  • Investigate the effects of air volume on pressure readings in different scenarios
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This discussion is beneficial for students and professionals in physics, engineering, and environmental science, particularly those interested in fluid dynamics and pressure measurement techniques.

Colin Wilson
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If you had pressure sensors (red) inside closed containers (black). The one on the left having more air volume than the one on the right. They are inside a bucket (green) that is filled with water. The water will rise higher in the left container. Will the pressure sensor readings be identical or will the right one read higher?

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The pressure in the gas will be the same as that at the liquid surface inside the tube.
 
The right pressure sensor will read a higher pressure.
It is able to push water further downwards than the sensor on the left.
 

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