Objects passing from air to water without leaking

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A system for allowing objects to pass from air to water without leaking is challenging due to the significant density difference between the two mediums. The discussion explores the concept of using an airlock, which equalizes air pressure with water pressure, as a potential solution. Submarine openings are mentioned as examples of pressure management, but the focus remains on finding simpler methods for small objects to transition between air and water. The feasibility of such systems depends on engineering innovations that can manage pressure differences effectively. Overall, the conversation highlights the complexities involved in creating a leak-proof mechanism for this purpose.
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Is there a system (e.g. valve) which enables objects (e.g. ball) passing from air to water containers without leaking?

I imagine this is near to impossible since water is nearly 1,000 times denser than air...

To make it work air would have to be compressed so air density in air container is close to that of water density in water container?

I wonder how those openings in submarines work (serving divers to go in/out of water at depths) where water doesn't fill the submarine?
(I doubt air pressure in submarine is equal to water pressure there at great depths, or is it?)
 
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Boy@n said:
Is there a system (e.g. valve) which enables objects (e.g. ball) passing from air to water containers without leaking?

Yes there is a very special valve that governs just this, in engineering terms it's referred to as the Atmosphere.

I imagine this is near to impossible since water is nearly 1,000 times denser than air...

Not true, conduct an experiment: turn on a bath, step into the water, then step out, neglecting the water on your legs and assuming you have a plug in, observe if it leaks. write back with the results, I'm interested to know what they are.

I wonder how those openings in submarines work (serving divers to go in/out of water at depths) where water doesn't fill the submarine?
(I doubt air pressure in submarine is equal to water pressure there at great depths, or is it?)

some special kind of submarines do run the same internal pressure as the outside water pressure, kind of like upside-down boats. The titanic was a great example of this.
 
I see my question is not clear enough.

I'm asking about a way for object to pass into water from air through vertical 'wall' (say via valve in middle of that wall)...
 
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MATLABdude said:
An airlock? http://en.wikipedia.org/wiki/Airlock
Thanks! That's pretty close to what I'm seeking...

Airlock: 'The air pressure of the airlock—the space between the doors—is equalized with that of the environment beyond the next door to open.'

Is there a simpler way to make small objects pass from air to water (without the need for adapting pressure)?
 
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