ChemEngineer
Diamond Member
- Feb 5, 2019
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One cubic mile of air at sea level (1 x 1 x 1) weighs 5.6 million tons.
Most people guess "zero," claiming that air is weightless. If that were true, nothing could fly.
All flight is only possible by pushing down an equal weight of air, which is dependent on altitude, then atmospheric pressure, then humidity.
Standard pressure is defined as 14.7 pounds per square inch.
In college, I was an experienced scuba diver and cleaned the university pool bottom with scuba gear. Once out of curiosity, I extended a flexible snorkel in deep water and attempted to breathe with my head only 2 feet beneath the surface. Impossible! And I was in top physical condition.
Thirty-three feet of water equals 14.7 PSI, and each subsequent 33 feet adds another 14.7 PSI because water is virtually incompressible.
(Calculations done here for the first time, as an afterthought. Lungs roughly 12 inches across and 10 inches top to diaphragm. One hundred twenty square inches. Water pressure equals 3 feet/33 feet x 14.7 PSI equals about 1.6 psi. So one hundred ninety-six pounds of water pressure prevented me from inhaling.)
Our minds are like our muscles. Use them daily or they deteriorate. Just look at any Democrat for proof.
Most people guess "zero," claiming that air is weightless. If that were true, nothing could fly.
All flight is only possible by pushing down an equal weight of air, which is dependent on altitude, then atmospheric pressure, then humidity.
Standard pressure is defined as 14.7 pounds per square inch.
In college, I was an experienced scuba diver and cleaned the university pool bottom with scuba gear. Once out of curiosity, I extended a flexible snorkel in deep water and attempted to breathe with my head only 2 feet beneath the surface. Impossible! And I was in top physical condition.
Thirty-three feet of water equals 14.7 PSI, and each subsequent 33 feet adds another 14.7 PSI because water is virtually incompressible.
(Calculations done here for the first time, as an afterthought. Lungs roughly 12 inches across and 10 inches top to diaphragm. One hundred twenty square inches. Water pressure equals 3 feet/33 feet x 14.7 PSI equals about 1.6 psi. So one hundred ninety-six pounds of water pressure prevented me from inhaling.)
Our minds are like our muscles. Use them daily or they deteriorate. Just look at any Democrat for proof.
