PSN-L Email List Message

Subject: Re: Lehman construction
From: "Charles R. Patton" crpatton@......
Date: Thu, 13 Jan 2000 12:13:19 -0800



 twleiper@........ wrote:
>So here is the challenge question:
>Assuming identical detector,gain and filtration (they are) and only the

>difference in period, can you calculate the capacity of the oil truck?
>(ST, Give everybody else a day before posting the correct answer,
>please...)

Doug Crice wrote:
"...whether the drift is caused by mutual gravitational attraction
between the oil truck and
seismometer..."

And just for fun, another idle thought, what about the distortion to the
Earth's magnetic field due to the large diamagnetic body (the oil) in
the vicinity.  Just as a helpful hint, I have estimated that fuel oil
might be cycloheptane (C7H14) (see also:
http://www.bowdoin.edu/dept/es/200/guide/oil.html and search for
cycloalkanes).  Based on that, the Chemistry Physics handbook says the
diamagnetic suseptibility is minus 73.9 e-6 for cycloheptane.

Also I think the the problem statement is incomplete.  Don't I need to
know the bedrock composition so I can estimate the strain coefficient?

I must have too much time on my hands.
Regards,
Charles R. Patton


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Larry Cochrane <cochrane@..............>