Re: [asa] writing equations - a request

Blackbody radiation wouldn't be reflected but would cool the whole system?
Reflections take energy too.
Randy

----- Original Message -----
From: "George Murphy" <gmurphy@raex.com>
To: "Bill Hamilton" <williamehamiltonjr@yahoo.com>; "ASA list"
<asa@calvin.edu>; "Janice Matchett" <janmatch@earthlink.net>
Sent: Thursday, July 20, 2006 3:37 PM
Subject: Re: [asa] writing equations - a request

> With perfect reflectors &c - again this is an ideal Gedankenexperiment -
> all the rays emitted by the iron should go to the other focus.
>
> But ray optics is only an approximation.
>
> Shalom
> George
> http://web.raex.com/~gmurphy/
> ----- Original Message -----
> From: "Bill Hamilton" <williamehamiltonjr@yahoo.com>
> To: "George Murphy" <gmurphy@raex.com>; "ASA list" <asa@calvin.edu>;
> "Janice Matchett" <janmatch@earthlink.net>
> Sent: Thursday, July 20, 2006 3:09 PM
> Subject: Re: [asa] writing equations - a request
>
>
>> What about
>> the heat energy that is disipated from the iron into the clothes
>> the heat energy that is absorbed by the air between the two irons
>> the heat energy that is absorbed by objects in the room (including the
>> person doing the ironing)
>> ???
>>
>> --- George Murphy <gmurphy@raex.com> wrote:
>>
>>> Sort of, but the connection is pretty remote.
>>>
>>> The thrifty owners of the laundry have constructed their building in the
>>> form
>>> of an ellipsoid, and put irons at both foci. All the radiation from an
>>> instrument at one focus as it irons clothes is reflected to the other
>>> focus
>>> (by a well known property of the ellipse) & heats the other iron, which
>>> can
>>> then be used to iron other clothes. No heat is lost & no money needs to
>>> be
>>> spent in heating the irons once they've been heated up initially.
>>>
>>> What's wrong with this picture?
>>>
>>> (Of course an iron - whether a "mangle" or the usual household variety -
>>> isn't a mathematical point but that's not the "point" here.)
>>>
>>> Shalom
>>> George
>>> http://web.raex.com/~gmurphy/
>>> ----- Original Message -----
>>> From: Janice Matchett
>>> To: George Murphy ; ASA list
>>> Sent: Thursday, July 20, 2006 12:17 PM
>>> Subject: Re: [asa] writing equations - a request
>>>
>>>
>>> At 11:27 AM 7/20/2006, George Murphy wrote:
>>>
>>>
>>> A teaser: How many know "The paradox of the Chinese laundry"?
>>>
>>>
>>> @ Physicists know that we don't live in a frictionless world, so does
>>> it
>>> have anything to do with a lack of friction?
>>>
>>> ~ Janice
>>>
>>>
>>>
>>>
>>
>>
>> Bill Hamilton
>> William E. Hamilton, Jr., Ph.D.
>> 248.652.4148 (home) 248.821.8156 (mobile)
>> "...If God is for us, who is against us?" Rom 8:31
>>
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Received on Thu Jul 20 17:20:34 2006