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c s soh <cssoh@singnet.com.sg> wrote in message news:3C213F4F.CC899E....com.sg... (...) and (...) How about a vacuum flask (thermos), domestic lightbulb, or even CRT (cathode ray tube such) as in your TV or monitor. These all rely on a stored (...) (23 years ago, 20-Dec-01, to lugnet.robotics, lugnet.technic, lugnet.build)
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| | Re: Home-made One-way valve
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(...) Argh! <rant> It's been a long time since domestic lightbulbs were even partially evacuated - these days they are filled with some kind of relatively inert gas. Back in the 1940's and 50's they were partially evacuated - and on some old movies (...) (23 years ago, 20-Dec-01, to lugnet.robotics)
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| | Re: Home-made One-way valve
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In lugnet.robotics, sjbaker1@airmail.net writes: [snipped rant about light-bulbs] (...) Well, since a perfect vacuum has never (AFAIK) been shown to exist anyware (even in space), I guess you're right. However a partial vacuum is easy to "store" and (...) (23 years ago, 20-Dec-01, to lugnet.robotics)
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| | Re: Home-made One-way valve
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(...) a (...) tanks (...) own (...) So, define vacuum as an area of lower pressure than the surrounding environment. I think that satisfies most if not all of your requirements, and is what most people seem to think of when they mention vacuum. Andy (23 years ago, 20-Dec-01, to lugnet.robotics)
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| | Re: Home-made One-way valve
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(...) If you had a 1 atmosphere vacuum in a blue LEGO tank and you took it to the bottom of the Mariana Trench you would have about 13,000 atmospheres of vacuum in it. And if you took it out into space you would have *no* atmospheres in it. All this (...) (23 years ago, 20-Dec-01, to lugnet.robotics)
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| | Re: Home-made One-way valve
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(...) So you are happy to say that you can increase the amount of vacuum in a sealed tank by placing it at the bottom of a bucket of water? Mmm'K. ---...--- Steve Baker ---...--- Mail : <sjbaker1@airmail.net> WorkMail: <sjbaker@link.com> URLs : (8 (...) (23 years ago, 20-Dec-01, to lugnet.robotics)
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| | Re: Home-made One-way valve
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If the surrounding environment is the same as what should be in the tank if not for the vacuum - since all are partial anyway - the the vacuum doesn't increase. The matter has to be the same. Andy ----- Original Message ----- From: "Steve Baker" (...) (23 years ago, 21-Dec-01, to lugnet.robotics)
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