🚀 go-pugleaf

"Phred" <ppnerkDELETETHIS@yahoo.com> wrote in message
news:87udp1FslcU1@mid.individual.net...
> In article <4c187448$0$17177$afc38c87@news.optusnet.com.au>, "Peter Webb"
<webbfamily@DIESPAMDIEoptusnet.com.au> wrote:
> >You can't siphon a gas.
>
> Nonsense.  You need to think more broadly.
>
> >The gas in the upper reservoir would simply disperse into the atmosphere.
> >You could enclose the gas at each end in some flexible membrane, but this
> >would cause the pressures at each end to equalise and there would be no
> >force to push the gas through the "siphon".
> >
> >BTW, siphons work because atmospheric pressure pushes the liquid through
the
>
> Nonsense.  Syphons work by gravity, not atmospheric pressure.
>
> >siphon. That is why they don't work in a vacuum. If the atmospheric
pressure
> >is low enough at the receiving end, siphons can pump water up hill (ie
> >against the force of gravity).
>
> Sounds like a typical suction pump to me.
>
> >"terryc" <newsninespam-spam@woa.com.au> wrote in message
> >news:hscssf$3ii$1@speranza.aioe.org...
> >> On Tue, 11 May 2010 19:47:54 +0000, Don H wrote:
> >>
> >>> It seems the Oxford dictionary (and others?) has an incorrect
definition
> >>> of "siphon"; attributing the agent involved as atmospheric pressure,
not
> >>> gravity.
> >>>   But the key aspect of a siphon is surely that it is a tube with one
leg
> >>> longer than the other - but makes a "fluid' (liquid; gas) go upwards,
> >>> before descending.
> >>>   Hence, the fluid "defies" gravity, before succumbing to it.  How?
> >>>   Presumably, because of internal cohesion of the fluid concerned -
the
> >>> molecules drag each other along (viscosity?); otherwise, the whole
> >>> system just wouldn't work.
> >>>   The agent involved may well be gravity - but can you siphon a gas?
> >>
> >> Yes. Think of pools of gas, e.g. cold air. The critical part of the
> >> gravity siphon explanation is that both legs/tubes of te siphon are
> >> filled with the gas that you are siphonig.
>
>
> Cheers, Phred.
>
> -- 
> ppnerkDELETE@THISyahoo.com.INVALID
>

# Science goes by facts; so, has any actual experiment been done which shows
a gas can be siphoned?
   If not, then "fluid" (ability to flow) should be confined to "liquid", in
this context.
  "Gas" is not automatically ruled out, but must rely on evidence to warrant
inclusion.