RE: [Vo]:Hot air rises, even in constant volume

2011-06-20 Thread Hoyt A. Stearns Jr.
: Thursday, June 16, 2011 6:43 AM To: vortex-l@eskimo.com Subject: Re: [Vo]:Hot air rises, even in constant volume Air baloon float because of Archimedes' principle. Pressure inside the baloon balances external pressure + baloon surface elastic force any time. So if inner temperature is high

Re: [Vo]:Hot air rises, even in constant volume

2011-06-17 Thread Stephen A. Lawrence
On 11-06-16 08:57 AM, David Jonsson wrote: Good to hear. I have been thinking since March last year. First step is to determine if Coreolis or centrifugal acceleration is the case. OK, I think I've got it. I'm assuming your reasoning is purely Newtonian -- you are using a pure

Re: [Vo]:Hot air rises, even in constant volume

2011-06-16 Thread David Jonsson
Good to hear. I have been thinking since March last year. First step is to determine if Coreolis or centrifugal acceleration is the case. David On Jun 15, 2011 10:42 PM, Stephen A. Lawrence sa...@pobox.com wrote: On 11-06-15 09:03 AM, David Jonsson wrote: On Sun, Jun 12, 2011 at 10:50 PM,

Re: [Vo]:Hot air rises, even in constant volume

2011-06-16 Thread Michele Comitini
Air baloon float because of Archimedes' principle. Pressure inside the baloon balances external pressure + baloon surface elastic force any time. So if inner temperature is high enough air density inside is lower that air density outside. pV = nRT mic 2011/6/11 David Jonsson

Re: [Vo]:Hot air rises, even in constant volume

2011-06-15 Thread David Jonsson
On Sun, Jun 12, 2011 at 10:50 PM, Stephen A. Lawrence sa...@pobox.comwrote: On 11-06-11 01:58 PM, David Jonsson wrote: Hi This obvious fact from hot air balloons and rising smoke is also the case in constant volume. Just do the math if you can't see what I mean. Imagine a ball on lying

Re: [Vo]:Hot air rises, even in constant volume

2011-06-15 Thread Stephen A. Lawrence
On 11-06-15 09:03 AM, David Jonsson wrote: On Sun, Jun 12, 2011 at 10:50 PM, Stephen A. Lawrence sa...@pobox.com mailto:sa...@pobox.com wrote: But using the Newtonian mechanics model itself, if you arrive at the conclusion that the box is lighter when the ball is bouncing, you

Re: [Vo]:Hot air rises, even in constant volume

2011-06-12 Thread David Jonsson
Now I think I am wrong. I forgot that higher speed makes bouncing more frequent so the effect cancels out. But the horizontal effect is still there. So it is still true that hotter gas in constant volume becomes lighter. Unless something is happening at the walls. David On Sat, Jun 11, 2011 at

Re: [Vo]:Hot air rises, even in constant volume

2011-06-12 Thread Stephen A. Lawrence
On 11-06-11 01:58 PM, David Jonsson wrote: Hi This obvious fact from hot air balloons and rising smoke is also the case in constant volume. Just do the math if you can't see what I mean. Imagine a ball on lying at rest in a box. This is equivalent of a cold gas. All pressure from the ball