[time-nuts] Thermal time constant

Don Latham djl at montana.com
Thu Mar 11 06:57:18 UTC 2010


water is pretty good, too and cheap. Coupling to it is easy as well.
Don

----- Original Message ----- 
From: "jimlux" <jimlux at earthlink.net>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Wednesday, March 10, 2010 9:35 PM
Subject: Re: [time-nuts] Thermal time constant


> Bob Camp wrote:
>> Hi
>>
>> The gotcha is that you are interested in the amount of heat per cubic 
>> foot rather than the amount of heat per pound. You need to take the 
>> standard heat per weight numbers and convert them to heat per volume 
>> numbers. Of the things you can easily get, copper is good. Steel is not 
>> as good as copper, but better than aluminum. Bob
>>
>
> Gold is your friend. Mercury has convective losses because it's a liquid. 
> Platinum or Osmium would also be ok.
>
> You might want something that is dense but lower conductivity.. lead? 
> Depleted Uranium? (DU is available very cheaply if you can take 80,000 
> pound lots)
>
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