The dissolving in salt water is a matter of course, actually. I used to
work on fixed sonar equipment. It's astounding - the first time -  what
happens to dissimilar metals in salt water when there is a small current
flow for one reason or another. But quickly you just learn from your
elders: tell the customer not to violate the installation instructions. And
tell them not to bother to sue. They'll lose.


On Fri, Sep 21, 2012 at 9:04 PM, Eric Walker <> wrote:

> On Fri, Sep 21, 2012 at 8:57 PM, Jones Beene <> wrote:
> Ohmic heating is fully conservative, and if you put in 10 watts of electric
>> power and get back 12 watts of heat, then either it is measurement error…
>> or
>> … not exactly Joule heating.
> Just to clarify -- I enjoyed the report.  I also took particular pleasure
> in hearing about the nickels that others ended up dissolving; I didn't know
> that would happen.  I was curious -- what were the details of the power
> measurements?  Was the signal steady or did it fluctuate?  Did you do any
> kind of calibration?
> Eric

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