Yes, but they jiggle regardless of whether the band is stretched or
not so I don't see how the jiggling provides any means of energy
storage (other than normal thermal energy storage).

Sean


On Sat, Sep 8, 2012 at 11:02 PM, Paul Anderson <wackyvorlon@me.com> wrote:
> But they do jiggle faster and slower, depending on the temperature.
>
> --------
> 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.
>>
>> Sean
>>
>>
>> On Sat, Sep 8, 2012 at 3:09 PM, Tamas Rudnai <tamas.rudnai@gmail.com> wr=
ote:
>>> These "jiggling things" are very interesting. On that video Feynman cla=
ims
>>> that when you tie some paper together with a rubber band particles insi=
de
>>> keep "jiggling" as long as you keep it like that (except that rubber do=
es
>>> not last forever). It seems to me that it is a very good way to store
>>> energy for a longer period of time.
>>>
>>> Tamas
>>>
>>>
>>> On 8 September 2012 10:51, Sean Breheny <shb7@cornell.edu> wrote:
>>>
>>>> Thanks! I had not found such a simple explanation before!
>>>>
>>>> On Sat, Sep 8, 2012 at 11:53 AM, Peter Johansson <rockets4kids@gmail.c=
om>
>>>> wrote:
>>>>> On Sat, Sep 8, 2012 at 3:23 AM, Sean Breheny <shb7@cornell.edu> wrote=
:
>>>>>
>>>>>> A long time ago I noticed that a rubber band feels cool after it is
>>>>>> stretched and released.
>>>>>
>>>>> The physics, as described by Feynman:
>>>>>
>>>>> http://www.youtube.com/watch?v=3DXRxAn2DRzgI
>>>>>
>>>>> -p.
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