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From: paulh on 16 Feb 2007 08:20 On Fri, 16 Feb 2007 21:45:14 +1100, "Dale Porter" <daleaporter(a)gmail.com> wrote: >"paulh" <paulh(a)fahncahn.com> wrote in message news:qi2bt2hq7nbhf2t7lhsl3o12l3fthigvmf(a)4ax.com... >> On Fri, 16 Feb 2007 18:37:54 +1000, Toosmoky <toosmoky(a)hotmail.com> >> wrote: >> >>>Iain Chalmers wrote: >>> >>>> Perhaps only blimps and air-ships actually "float" in Nev-land since >>>> they manage to keep 100% of their mass out of the water? :-) >>> >>>As ships displace water, so airships displace air... >> >> Air is compressible, Water isn't. So airships just might push the air >> aside. >> >> > >But isn't pushing the air aside also displacing it? Not really... theoretically if you displace water then the water that has been displaced must go somewhere else. That is, the water level in the bath rises. But in air there would be no increase in 'air level', but the air would just get denser instead. In a real life experiment (with an airship) it would possibly do a bit of both as the enviroment is far more complex. paulh
From: paulh on 16 Feb 2007 08:20 On Fri, 16 Feb 2007 23:41:18 +1100, Aeek <aeeeeeek(a)tpg.com.au> wrote: >>> Air is compressible, Water isn't. So airships just might push the air >>> aside. >>> >>> paulh >> >>I'd say unless the water has been frozen, but who'd listen anyway? >> >>Hammo > >Water is compressible when frozen ???? > >PS how did you know I was drinking plonk? >Andre ==================== Speed Thrills! Everything's compressible under the right conditions. paulh
From: Knobdoodle on 16 Feb 2007 08:45 "Iain Chalmers" <bigiain(a)mightymedia.com.au> wrote:> > big (and no, "current mood" is not an alternator efficiency joke ;-) ) > Heh heh; so the alternator COULD run the headlights without dropping revs but it's just being intentionally difficult? -- Clem
From: Knobdoodle on 16 Feb 2007 08:49 "Toosmoky" <toosmoky(a)hotmail.com> wrote in message news:45d59e35$0$492$61c65585(a)uq-127creek-reader-03.brisbane.pipenetworks.com.au... > Dale Porter wrote: >> "paulh" <paulh(a)fahncahn.com> wrote > >>> Air is compressible, Water isn't. So airships just might push the air >>> aside. > >> But isn't pushing the air aside also displacing it? > > 1. If an airship came down in the ocean, would the average world > barometric pressure change? > Probably not if the helium wasn't compressed and if the released helium didn't escape the atmosphere. > > 2. If so, would it be measurable? > Not in any way I can imagine. > > 3. Would it be a waste of helium? > Helluva waste! 10,000 drunken-dads wouldn't be able to do the "Donald Duck" voice at kids parties! (Ohh the humanity!) -- Clem
From: Hammo on 16 Feb 2007 10:01
On 16/2/07 7:26 PM, in article bigiain-83E7BC.19260716022007(a)nasal.pacific.net.au, "Iain Chalmers" <bigiain(a)mightymedia.com.au> wrote: > > big (are you gonna stalk me round every aus.moto thread since I gave up > on you in the "magic headlights running on no energy" thread? ;-) ) Actually I noticed you had no rebuttal on your calcs based in my back of envelope one. Why was that? Hammo |