Congratulations was RE: Physics puzzler was Flat Facts

[Alan]

Yes, you pass with honors.

Destoying the spring, in this case, will generate more total heat than
destroying an equivalent strip of metal without the static tension of the
coil. 

Bravo, huzzah, Joe Garrett has a stochastic doughnut for you! (You have to
pick it up.)

Alan R. Barnard
Salem, MO


-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf
Of Andy Moore
Sent: Monday, March 28, 2005 2:30 PM
To: Pianotech
Subject: Re: Physics puzzler was Flat Facts


Alan wrote:
> Reminded me of this question that my old high school physics teacher 
> posed: "I you wind a watch spring extremely tightly into itself, then 
> put it in a stainless steel case that fits snug enough so the spring 
> cannot unwind, then add a drop of water and acid, then seal the whole 
> system shut so no moisture can enter or leave, the spring will 
> eventually dissolve/rust away. Where did the energy of coiled spring 
> go?"
> 

Harkening back to my chemistry days here...

A lot of it would be dissipated as heat energy from the exothermic reaction
of 
the acid and metal.  You will most likely get some kinetic energy released
as 
well when there is enough corrosion in the spring creates ample space for 
microcracks to appear.

This, of course, is assuming the metal has a perfect resiliency.  Springs
that 
are tightly wound will eventually lose their "springiness" as the molecules
in 
the metal rearrange themselves into the new shape.  Again, this energy would
be 
dissipated as heat. Bend a coathanger and feel the bend point immediately 
afterward and you can feel the heat created.

Theoretically speaking, energy/mass is never lossed or gained, it just
changes 
states. (E=MC^2)

Did I pass that essay test? ;-)

-- 
Andy Moore
Make Moore Music - Piano Tuning & Service
PO Box 240635
Apple Valley, MN 55124
email: andy@makemooremusic.com
phone: 651-494-4378 _______________________________________________
pianotech list info: https://www.moypiano.com/resources/#archives

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