some questions

[Cannon]

I remember watching a video that explains that famous "salty and sweet sea not mixing", but i can't find it anywhere now and i don't remember the explanation.

Can someone explain or give some urls and videos?

And btw can you give me some good science/physics sites where I'll get correct and good answers.

Thanks in advance

[lajoswinkler]

Salty and nonsalty fluids mix readily, but they can form transient "phases" in oceans. Unfortunatelly, stupid people turned that into a pseudoscientific meme around this photo often captioned as "two seas not mixing".

This exists as a dynamic balance. New salty fluid is coming and new nonsalty fluid is coming all the time. Their solution flows beneath.

It doesn't happen always, though. Specific weather properties follow this behaviour.

[Tex_NL]

Same thing frequently happens when two rivers merge. One with and one without sediment.

[lajoswinkler]

That's a great example of laminar turning into turbulent flow on a great scale.