- 18
- 0
When an item is submerged underwater, I believe that pressure from the surrounding water is equal in pressure around the item except from beneath, is this correct?
The pressure exerted by a liquid increases linearly with depth, i.e. the deeper you go the more pressure is exerted. However, this pressure is exerted uniformly at a certain 'level' in all directions. Therefore, there is a greater force (note force not pressure) pushing a submerged object upwards than downwards; i.e. there is a net force upwards. This is buoyancy.When an item is submerged underwater, I believe that pressure from the surrounding water is equal in pressure around the item except from beneath, is this correct?
I'm confused. Are you pumping air down? "pump air too, say a depth of eight feet"If you might indulge me,? , if I wanted to pump air too, say a depth of eight feet, and I only was equipped with something with a low psi, (very minimal psi), how would it be easier to have the air break the barrier of pressure/force to escape its chamber?
Would I have a better chance at trying to get the low pressure air out by pointing it upwards or down, (at that eight foot level).
Before I forget there is a sort of check valve on it that won't let water through its outlet, but air can move freely throught it.