# What is normal air pressure in N/cm^2?

by rogerk8
Tags: n or cm2, normal, pressure
 P: 183 The thought is that pressure from the outside of its skin is pressing equally much from the inside of its skin. And putting one finger of my left hand against one finger of my right hand with increasing force/pressure makes me think that that guys skin is rough. Don't you think so too? Best regards, Roger
 Emeritus Sci Advisor PF Gold P: 16,462 I ask again. Why is the skin different from any other part of its body?
 P: 183 I totally get it now. Consider a lidless and bottomless box of fragile ginger bread (that we say is water resistant). Let's place this fragile frame at a table (1atm) first. Being causious it will stand unharmed. Now, moving it slowly down into water it will remain unharmed regardless of depth and therefore pressure! It is not until we move it at a certain speed (especially sideways) according to $$p=1/2\rho v^2$$ that we generate an additional pressure component which will destroy the frame. In other words, ambient pressure has no effect whatsoever (it just states that there is some fluid available). It's the density of the fluid and speed of the object, in this case, that has effect. More generally, "felt" pressure is indeed differential. Roger and out
 P: 223 We're simply used to 1 atm, hence we don't feel it. If you can, go to few hundred meters below the ground level, you'll start to feel something's different :D
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P: 22,313
 Quote by lendav_rott We're simply used to 1 atm, hence we don't feel it. If you can, go to few hundred meters below the ground level, you'll start to feel something's different :D