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Re: does a siphon work in vacuum?



Quoting Robert Cohen <Robert.Cohen@PO-BOX.ESU.EDU>:
...
Could you define "negative pressure"?

Fair question. In this case I meant negative *absolute* pressure.

I thought "negative pressure" meant a pressure less than atmospheric.

That would be called negative *gauge* pressure, and is not
what I meant.

Unless you are "grabbing" the liquid in a manner similar to "grabbing=
" a
rock, and letting the cohesion between the molecules "bring" the rest=
of
the liquid along with it, I don't see how it is possible to get a "le=
ss
than zero" pressure.

Well, that sort of "grabbing" is exactly the topic of discussion.
I believe it is possible. Tricky, but possible.