- Oct 18, 2003
- Saline Michigan
Oh. Put a block of stuff in air at seal level and it is all under 14.7 psi. Take it up to space and it is all under 0 psi. Take it down 1000' in the ocean and it is all at 450 psi. Take a styrene foam coffee cup down a couple thousand feet and it is a much smaller solid styrene cup under 900 psi.For perspective, I've spent hours stewing over this kindergarten problem: If my foam sheet is in a vacuum bag (near perfect) and 14.5psi atmospheric pressure is pressing on top of the foam sheet and on the bottom of the foam sheet, is the foam being subjected to 29psi? Or, is it just 14.5?