Re: [Phys-L] Ex: Re: global warming3

[Anthony Lapinski <alapinski@pds.org>]

I inhale it - so it must be safe!    :)      Also, helium. Amazing demos
for sound!

On Thu, Oct 28, 2021 at 2:24 PM Bill Norwood via Phys-l <
phys-l@mail.phys-l.org> wrote:

> Sulfur Hexafluoride also deepens one’s voice.
>
> Is this safe?
>
> Bill Norwood
> UMCP 1966-2018
>
> Sent from my iPhone
>
> > On Oct 28, 2021, at 1:21 PM, Brian Whatcott <betwys1@sbcglobal.net>
> wrote:
> > SF6 is the most potent greenhouse gas known. It is 22,800 times more
> effective at trapping infrared radiation than an equivalent amount of CO2
> and stays in the atmosphere for 3,200 years.
> > https://www.epa.gov/eps-partnership/sulfur-hexafluoride-sf6-basics
> >
> > Brian    On Thursday, October 28, 2021, 11:35:37 AM CDT, Zani, Gerald
> via Phys-l <phys-l@mail.phys-l.org> wrote:
> > I will do my best to answer you quickly now and then later will  try to
> get
> > you some references soon but I have to work on a project first.
> > There are * TWO!  *outstanding, published physics resource letters about
> > global warming which is where I did research and learned about the
> amazing
> > and horrible SF6.
> > This article discusses CO2 and the physical aspects of the global warming
> > potential criteria;
> > A Demonstration of the Infrared Activity of Carbon Dioxide
> > TPT. 57, 246 (2019).
> > Let me know if you need a copy. It does not discuss SF6.
> >
> > My wording "storing energy" is misleading, in this context.
> > Better to describe it as the "quantum mechanical atomic interaction of
> SF6
> > molecule with a particular IR band", the small IR that is most important
> > for measuring the global warming potential of a gas.
> >
> > The value for the specific heat doesn't really help to understand the
> > Global Warming Potential behavior in this context. It is the vibrational
> > frequencies of a gas that couple with a IR frequency band and the
> electric
> > dipole moment of a quantum operator that participates in this
> interaction.
> > SF6 over a 100-year period is 22,800 times more effective at trapping IR
> > than an equivalent amount of carbon dioxide. My 40,000 number was wrong.
> > But my point was, order-of-magnitude, a correct point; A tiny bit of
> > SF6 has a disproportionate impact on global warming potential, compared
> > with CO2.
> >
> > For years I did the standard greenhouse effect demo that most others also
> > do. It is a misleading demo that shows more about convection as a way to
> > trap heat. It is not really a true demo of global warming potential.
> >
> > A better greenhouse effect demo is described in the published TPT article
> > cited above.
> >
> > Best, - Jerry
> >
> > --
> > Gerald Zani
> > Senior Engineering Technician
> > Brown University School of Engineering
> > (401) 863-9571
> > _______________________________________________
> > Forum for Physics Educators
> > Phys-l@mail.phys-l.org
> > https://www.phys-l.org/mailman/listinfo/phys-l
> >
> > _______________________________________________
> > Forum for Physics Educators
> > Phys-l@mail.phys-l.org
> > https://www.phys-l.org/mailman/listinfo/phys-l
> _______________________________________________
> Forum for Physics Educators
> Phys-l@mail.phys-l.org
> https://www.phys-l.org/mailman/listinfo/phys-l

-- 


 <http://www.pds.org>
 <https://www.facebook.com/princetondayschool> 
<https://twitter.com/PDSPanthers> 
<https://www.youtube.com/channel/UCVE-nTva0BlK0rT6vayqpIQ> 
<https://www.instagram.com/princetondayschool/>


*CONFIDENTIALITY NOTE:* 
The information transmitted, including attachments, is intended only for 
the person(s) or entity to which it is addressed and may contain 
confidential and/or privileged material. Any review, retransmission, 
dissemination or other use of, or taking of any action in reliance upon 
this information by persons or entities other than the intended recipient 
is prohibited. If you received this in error, please contact the sender and 
destroy any copies of this information.




Please consider the environment 
before printing this email.