But they do jiggle faster and slower, depending on the temperature.=20

--------
Paul Anderson -- VE3HOP

On 2012-09-08, at 7:45 PM, Sean Breheny <shb7@cornell.edu> wrote:

> I think he is just talking about the thermal vibration of the
> molecules in the material. They are jiggling all the time, regardless
> of whether the rubber is stretched or not. His point is that the
> jiggling tends to kink the long-chain molecules so that their natural
> (at rest) length is shorter than their max possible (un-kinked)
> length.
>=20
> Sean
>=20
>=20
> On Sat, Sep 8, 2012 at 3:09 PM, Tamas Rudnai <tamas.rudnai@gmail.com> wro=
te:
>> These "jiggling things" are very interesting. On that video Feynman clai=
ms
>> that when you tie some paper together with a rubber band particles insid=
e
>> keep "jiggling" as long as you keep it like that (except that rubber doe=
s
>> not last forever). It seems to me that it is a very good way to store
>> energy for a longer period of time.
>>=20
>> Tamas
>>=20
>>=20
>> On 8 September 2012 10:51, Sean Breheny <shb7@cornell.edu> wrote:
>>=20
>>> Thanks! I had not found such a simple explanation before!
>>>=20
>>> On Sat, Sep 8, 2012 at 11:53 AM, Peter Johansson <rockets4kids@gmail.co=
m>
>>> wrote:
>>>> On Sat, Sep 8, 2012 at 3:23 AM, Sean Breheny <shb7@cornell.edu> wrote:
>>>>=20
>>>>> A long time ago I noticed that a rubber band feels cool after it is
>>>>> stretched and released.
>>>>=20
>>>> The physics, as described by Feynman:
>>>>=20
>>>> http://www.youtube.com/watch?v=3DXRxAn2DRzgI
>>>>=20
>>>> -p.
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>>>=20
>>=20
>>=20
>>=20
>> --
>> int main() { char *a,*s,*q; printf(s=3D"int main() { char *a,*s,*q;
>> printf(s=3D%s%s%s, q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }",
>> q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); }
>> --
>> http://www.piclist.com PIC/SX FAQ & list archive
>> View/change your membership options at
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> --=20
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
--=20
http://www.piclist.com PIC/SX FAQ & list archive
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