Why doesn't the sky crush us all?

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SUMMARY

The discussion centers on the question of why the atmosphere does not crush humans despite the immense weight of air above us. Key points include the concept of pressure equilibrium, where the pressure inside the human body matches atmospheric pressure, preventing compression. The weight of a column of air is approximately 14.7 pounds per square inch, which is manageable due to the equal distribution of pressure in all directions. Additionally, rapid changes in altitude can create pressure differences that are felt, such as ear popping during airplane takeoff and landing.

PREREQUISITES
  • Understanding of atmospheric pressure and its measurement (e.g., 1 atmosphere = 14.7 psi)
  • Basic knowledge of fluid dynamics and pressure equilibrium
  • Familiarity with human physiology related to pressure (e.g., lung function)
  • Concept of buoyancy and gas behavior under varying pressures
NEXT STEPS
  • Research the principles of hydrostatic pressure and its applications in scuba diving
  • Learn about the effects of rapid decompression and the physiological impacts on the human body
  • Study the ideal gas law and its implications for atmospheric behavior
  • Explore the concept of pressure differentials in aviation and their effects on passengers
USEFUL FOR

This discussion is beneficial for students of physics, biology, and environmental science, as well as professionals in aviation, scuba diving, and anyone interested in the effects of atmospheric pressure on the human body.

  • #31
I guess I ought to start a new thread to ask my question.

It's a little off the Why Doesn't The Sky Crush Us All topic.
 
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  • #32
Just because there are "tons" of matter somewhere above you, doesn't mean it is exerting any force on you. Why does your roof not crush you? Because something is holding it up. The reason air doesn't crush you is because more air is holding the higher air up.

EDIT: Oh no, I thought you were asking it again, but its different.
 
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