The discussion revolves around the nature of hydrostatic pressure and its directional effects, specifically whether it acts radially inwards or outwards. Participants explore this concept through examples such as divers experiencing pressure underwater and the behavior of water-filled balloons. The conversation includes theoretical considerations and practical implications related to diving and snorkeling.
Participants express differing views on the sensations experienced by divers and the implications of pressure in various scenarios. There is no consensus on the nature of the sensations felt by divers or the specific mechanics of pressure in relation to snorkeling versus scuba diving.
Some assumptions about pressure dynamics and the experiences of divers may not be fully explored, and the discussion reflects varying interpretations of pressure effects in different contexts.
russ_watters said:Divers do not get a crushing sensation. That would be awful and no one would want to do it!
The pressure pushes a balloon out because there is a higher pressure inside than outside.
The walls will constrain the liquid, yes - otherwise it would break and all the water would pour out.Freddy86 said:Thanks for the replies. So if you submerge an object in a jug of water then the pressure will be radially inwards on this object right? Is this because the walls of the jug are considered to be at greater pressure than the fluid then?
"Diving" typically means scuba diving. It isn't the same as snorkeling. dauto is right; for snorkeling, you have to fight the water pressure to breathe (as does your snorkel - if it isn't rigid it will collapse). But for scuba diving, you don't.No I meant that if a diver went down too deep they get a sense of being squeezed (maybe crush is too drastic). I thought this was why the depth of snorkeling is limited as the deeper you go the more your chest gets squeezed so at a particular depth you cannot expand your diaphragm anymore and are thus are unable to breath.