Mark, Imagine a room full of helium. Now place a baloon full of helium in it. What happens?
- Tom mark krawczuk wrote: >right , if helium doesnt creat lift, then why when i put helium in a >baloon it rises? if i dont put helium in a baloon it doesnt rise? so how i >figure it helium creats lift............ > > mark k >----- Original Message ----- >From: "Tom Richardson" <[EMAIL PROTECTED]> >To: <[EMAIL PROTECTED]> >Sent: Sunday, June 23, 2002 11:50 PM >Subject: Re: nitrogen filled tires > > >>Helium does not create lift. Rather, the force on the helium molecules >>(due to gravity) is smaller because it has a lower mass than air. Think >>of holding a ball underwater. >> >>Substitue the mass of a vacuum (zero) into this equation: force = mass * >>acceleration and you'll see what I mean. >> >>- Tom >> >>James Cox wrote: >> >>>Hum.. I don't know about that, sure that may hold true with no >>>athmosphere but helium being lighter than air, creates lift, and thus >>>less weight, even though the mass would be larger. >>> >>>(I got no idea how we got into this discussion on a Datsun forum!) >>> >>>James Cox >>> >>> >>>>Yes. A frame full of helium would have more mass than a frame under >>>>complete vacuum, therefore gravity would exert a larger force on the >>>>helium cos of one of Newton's laws, Force = mass * acceleration (ie >>>> >even > >>>>though helium is lighter than air, it's still heavier than nothing) You >>>>can't really use vacuum filled tyres though :) >>>> >>>>Aren't these digressions great? Who'd have thought there was a use for >>>>high school physics >>>> >>>>- Tom >>>> >>> >>>_________________________________________________________________ >>>Join the world's largest e-mail service with MSN Hotmail. >>>http://www.hotmail.com >>> >>>--membersozdat------------------------------------------------------- >>>OZDAT Mailing List Please Note:- >>>Send (un)subscribe requests to [EMAIL PROTECTED] >>>Send submissions to [EMAIL PROTECTED] >>>No unauthorised redistribution of this email >>>http://www.ozdat.com/ozdatonline/index.htm >>>http://www.ozdat.com/ozdatonline/listindex.html >>>http://www.mail-archive.com/[email protected]/ >>>--------------------------------------------------------------------- >>> >> >> > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
