Mailing List Archive Mailing List Archive
--part1_9b.112b7e57.27c5b552_boundary Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable Hi Brad, I have to agree that << ... Helium is lighter (less dense) than air ...>> an= d=20 that << ... it conducts heat much more quickly... >>, but I'm afraid I need=20 to disagree with you about your use of the word "therefore" between these tw= o=20 statements. I know of no physics theory that predicts that less dense mediums should=20 conduct heat more quickly. In fact a vacuum has a pretty low density and it= =20 "conducts" no heat whatsoever (radiation not considered). So I guess the facts you are stating are true, but the theory definately=20 isn't. Take care and dive safe, Scott Some weeks it's just not worth gnawing through the restraints and scrambling= =20 up out of the pit. In a message dated 2/20/2001 08:39:24 p.m. Hora est=E1ndar de EE.UU. O,=20 bradb@ex*.ne* writes: > Subj: Re: Helium thermal properties > Date: 2/20/2001 08:39:24 p.m. Hora est=E1ndar de EE.UU. O > From: bradb@ex*.ne* (Brad Beskin) > To: =20 >=20 > ... Helium is lighter (less dense)than air, and therefore it conducts heat= =20 > much more quickly. This is the reason you do not inflate your drysuit wit= h=20 > backgas. Use an independent inflation system with argon or air (argon is=20 > very dense and therfore insulates well) ...=20 --part1_9b.112b7e57.27c5b552_boundary Content-Type: text/html; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable <HTML><FONT FACE=3Darial,helvetica><FONT SIZE=3D2>Hi Brad, <BR> <BR>I have to agree that << ... Helium is lighter (less dense) than ai= r ...>> and=20 <BR>that << ... it conducts heat much more quickly... >>, but I'= m afraid I need=20 <BR>to disagree with you about your use of the word "therefore" between thes= e two=20 <BR>statements. <BR> <BR>I know of no physics theory that predicts that less dense mediums should= =20 <BR>conduct heat more quickly. In fact a vacuum has a pretty low densi= ty and it=20 <BR>"conducts" no heat whatsoever (radiation not considered). <BR> <BR>So I guess the facts you are stating are true, but the theory definately= =20 <BR>isn't. <BR> <BR>Take care and dive safe, Scott <BR> <BR>Some weeks it's just not worth gnawing through the restraints and scramb= ling=20 <BR>up out of the pit. <BR> <BR> <BR> <BR>In a message dated 2/20/2001 08:39:24 p.m. Hora est=E1ndar de EE.UU. O,=20 <BR>bradb@ex*.ne* writes: <BR> <BR><BLOCKQUOTE TYPE=3DCITE style=3D"BORDER-LEFT: #0000ff 2px solid; MARGIN-= LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj: <B>Re: Helium thermal= properties</B> <BR>Date: 2/20/2001 08:39:24 p.m. Hora est=E1ndar de EE.UU. O <BR><I>From: bradb@ex*.ne* (Brad Beskin) <BR>To: moorea@uo*.co*.br* (moorea(uol)), techdiver@aquanau= t.com</BLOCKQUOTE></I> <BR><BLOCKQUOTE TYPE=3DCITE style=3D"BORDER-LEFT: #0000ff 2px solid; MARGIN-= LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"> <BR>... Helium is lighter (less dense)than air, and therefore it conducts he= at=20 <BR>much more quickly. This is the reason you do not inflate your drys= uit with=20 <BR>backgas. Use an independent inflation system with argon or air (ar= gon is=20 <BR>very dense and therfore insulates well) ... </FONT></HTML> --part1_9b.112b7e57.27c5b552_boundary-- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]