Does a Vacuum Cleaner work inside a Vacuum?

mongobonix

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>A colleague asked me this and now it\'s doing my head in.\nSo does anyone know...\n"Does a Vacuum Cleaner work inside a Vacuum?"\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>A colleague asked me this and now it's doing my head in.
So does anyone know...
"Does a Vacuum Cleaner work inside a Vacuum?"

mathman

I doubt it. The general principle of a vacuum cleaner is to generate a wind current in the hose by lowering the air pressure. In a vacuum, the pressure is starting at 0, so it can't be reduced.

Gerard Westendorp

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>mongobonix wrote:\n\n> A colleague asked me this and now it\'s doing my head in.\n> So does anyone know...\n> "Does a Vacuum Cleaner work inside a Vacuum?"\n>\n>\n\nNo. As pressure approaches vacuum, pumps start pumping\nless and less molecules per second. It takes a very\nlong time to pump a good vacuum, as people doing\nhigh vacuum experiments will testify. At zero pressure,\na vacuum cleaner will just be a rotating disk that does\nno pumping.\n\n\nGerard\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>mongobonix wrote:

> A colleague asked me this and now it's doing my head in.
> So does anyone know...
> "Does a Vacuum Cleaner work inside a Vacuum?"
>
>

No. As pressure approaches vacuum, pumps start pumping
less and less molecules per second. It takes a very
long time to pump a good vacuum, as people doing
high vacuum experiments will testify. At zero pressure,
a vacuum cleaner will just be a rotating disk that does
no pumping.

Gerard

Igor Khavkine

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>On Sat, 12 Mar 2005 14:08:21 +0000, mongobonix wrote:\n\n> A colleague asked me this and now it\'s doing my head in. So does anyone\n> know...\n> "Does a Vacuum Cleaner work inside a Vacuum?"\n\nNo. A vacuum cleaner works by sucking in air. It is the air that drags\ndirt particles with it. In vacuum, no air is present, hence this principle\ncannot work.\n\nIgor\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>On Sat, 12 Mar 2005 14:08:21 [itex]+0000,[/itex] mongobonix wrote:

> A colleague asked me this and now it's doing my head in. So does anyone
> know...
> "Does a Vacuum Cleaner work inside a Vacuum?"

No. A vacuum cleaner works by sucking in air. It is the air that drags
dirt particles with it. In vacuum, no air is present, hence this principle
cannot work.

Igor

Jesse Nochella

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>Fair question.\n\nIt does not. If you were on the back end of a fan in space you would\nnot get pulled towards just as you would not get a breeze if you were\nin front of it.\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>Fair question.

It does not. If you were on the back end of a fan in space you would
not get pulled towards just as you would not get a breeze if you were
in front of it.

Martin Hogbin

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>"mongobonix" <amok82@hotmail.com> wrote in message news:b2283cd9.0503110829.67dc7dc6@posting.google.com...\n> A colleague asked me this and now it\'s doing my head in.\n> So does anyone know...\n> "Does a Vacuum Cleaner work inside a Vacuum?"\n\n\nNo, it needs air to work.\n\nMartin Hogbin\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>"mongobonix" <amok82@hotmail.com> wrote in message news:b2283cd9.0503110829.67dc7dc6@posting.google.com...
> A colleague asked me this and now it's doing my head in.
> So does anyone know...
> "Does a Vacuum Cleaner work inside a Vacuum?"

No, it needs air to work.

Martin Hogbin

DGoncz@aol.com

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>mongobonix wrote:\n> A colleague asked me this and now it\'s doing my head in.\n> So does anyone know...\n> "Does a Vacuum Cleaner work inside a Vacuum?"\n\n\nOnly inside a dirty vacuum! :)\n\nThat is, only when there is a little gas floating around to move the\ndirt with. It\'s the pressure of this gas that makes the vacuum cleaner\nwork, not the "creation of a vacuum."\n\nDoug\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>mongobonix wrote:
> A colleague asked me this and now it's doing my head in.
> So does anyone know...
> "Does a Vacuum Cleaner work inside a Vacuum?"

Only inside a dirty vacuum! :)

That is, only when there is a little gas floating around to move the
dirt with. It's the pressure of this gas that makes the vacuum cleaner
work, not the "creation of a vacuum."

Doug

Paul Danaher

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>mongobonix wrote:\n> A colleague asked me this and now it\'s doing my head in.\n> So does anyone know...\n> "Does a Vacuum Cleaner work inside a Vacuum?"\n\n(What\'s a vacuum cleaner? Does a diffusion pump qualify?) I can blow a\nballoon away very easily with a puff of air from several feet. I can\'t\nsuck a balloon towards me - unless it\'s close to my mouth. What changes\nto make this possible at close range? Boundary conditions?\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>mongobonix wrote:
> A colleague asked me this and now it's doing my head in.
> So does anyone know...
> "Does a Vacuum Cleaner work inside a Vacuum?"

(What's a vacuum cleaner? Does a diffusion pump qualify?) I can blow a
balloon away very easily with a puff of air from several feet. I can't
suck a balloon towards [itex]me -[/itex] unless it's close to my mouth. What changes
to make this possible at close range? Boundary conditions?

Dirk Van de moortel

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>"mongobonix" <amok82@hotmail.com> wrote in message news:b2283cd9.0503110829.67dc7dc6@posting.google.com...\n> A colleague asked me this and now it\'s doing my head in.\n> So does anyone know...\n> "Does a Vacuum Cleaner work inside a Vacuum?"\n\nIf the vacuum is sufficiently dirty, the cleaner will work just fine.\n\nDirk Vdm\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>"mongobonix" <amok82@hotmail.com> wrote in message news:b2283cd9.0503110829.67dc7dc6@posting.google.com...
> A colleague asked me this and now it's doing my head in.
> So does anyone know...
> "Does a Vacuum Cleaner work inside a Vacuum?"

If the vacuum is sufficiently dirty, the cleaner will work just fine.

Dirk Vdm

David Winsemius

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>mongobonix wrote in news:b2283cd9.0503110829.67dc7dc6@posting.google.com:\n\n> A colleague asked me this and now it\'s doing my head in.\n> So does anyone know...\n> "Does a Vacuum Cleaner work inside a Vacuum?"\n>\n>\nSee if you can answer a related question:\nWhat is the sound of a fan operating in a vacuum?\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>mongobonix wrote in news:b2283cd9.0503110829.67dc7dc6@posting.google.com:

> A colleague asked me this and now it's doing my head in.
> So does anyone know...
> "Does a Vacuum Cleaner work inside a Vacuum?"
>
>
See if you can answer a related question:
What is the sound of a fan operating in a vacuum?

Uncle Al

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>\nmongobonix wrote:\n>\n> A colleague asked me this and now it\'s doing my head in.\n> So does anyone know...\n> "Does a Vacuum Cleaner work inside a Vacuum?"\n\nNo. What would create the mass flow that entraps particulates? It\'s\nnot much of a problem, though, for people don\'t live in local vacua\nunless they are encapsulated. The problem then is not harvesting\npariculates, it is changing diapers.\n\n--\nUncle Al\nhttp://www.mazepath.com/uncleal/\n(Toxic URL! Unsafe for children and most mammals)\nhttp://www.mazepath.com/uncleal/qz.pdf\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>mongobonix wrote:
>
> A colleague asked me this and now it's doing my head in.
> So does anyone know...
> "Does a Vacuum Cleaner work inside a Vacuum?"

No. What would create the mass flow that entraps particulates? It's
not much of a problem, though, for people don't live in local vacua
unless they are encapsulated. The problem then is not harvesting
pariculates, it is changing diapers.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf

JF.Hofmann

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>\nNo, it doesn\'t. In a vacuum the absolute pressure is (close to) zero.\nThere is no air left. As the vacuum cleaner relies on it air pressure\ndifference which it creates, it can\'t work anymore. A VC is basically a\npump for air and as there is no air in a vacuum, there is nothing it\ncan pump. It is like a pump which is designed to pump water. If there\nis no water to pump, the motor will still run, but it can\'t pump water\nany more. It will start to cavitate and be damaged after a short time.\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>No, it doesn't. In a vacuum the absolute pressure is (close to) zero.
There is no air left. As the vacuum cleaner relies on it air pressure
difference which it creates, it can't work anymore. A VC is basically a
pump for air and as there is no air in a vacuum, there is nothing it
can pump. It is like a pump which is designed to pump water. If there
is no water to pump, the motor will still run, but it can't pump water
any more. It will start to cavitate and be damaged after a short time.

Cl.Massé

<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no, scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>"mongobonix" <amok82@hotmail.com> a écrit dans le message de\nnews:b2283cd9.0503110829.67dc7dc6@posting.google.com...\n\n> A colleague asked me this and now it\'s doing my head in.\n> So does anyone know...\n> "Does a Vacuum Cleaner work inside a Vacuum?"\n\nEverybody would answer "no", nevertheless, what do you mean by "work",\nby "vacuum cleaner", and by "vacuum"?\n\n--\n~~~~ clmasse on free F-country\nLiberty, Equality, Profitability.\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form">  View this Usenet post in original ASCII form </a></div><P></jabberwocky>"mongobonix" <amok82@hotmail.com> a écrit dans le message de
news:b2283cd9.0503110829.67dc7dc6@posting.google.com...

> A colleague asked me this and now it's doing my head in.
> So does anyone know...
> "Does a Vacuum Cleaner work inside a Vacuum?"

Everybody would answer "no", nevertheless, what do you mean by "work",
by "vacuum cleaner", and by "vacuum"?

--
~~~~ clmasse on free F-country
Liberty, Equality, Profitability.

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mathman Recognitions: Science Advisor	I doubt it. The general principle of a vacuum cleaner is to generate a wind current in the hose by lowering the air pressure. In a vacuum, the pressure is starting at 0, so it can't be reduced.