## PSN-L Email List Message

**
Subject: Re: Lehman construction**

From: ChrisAtUpw@.......

Date: Thu, 13 Jan 2000 18:09:28 EST

>> No, obviously the frame is a strong magnetic effect, but the question is=20
phrased that the oil load made a difference so theoretically all we have to=20
consider is the delta effect, as the question was, =E2=80=9C=E2=80=A6can you=
calculate the=20
capacity of the oil truck?=E2=80=9D Doug and I are just speculating about o=
ther=20
possible effects than just the weight of the oil on the bedrock. I was=20
speculating primarily tongue-in-cheek, as probably for any possibility of th=
e=20
effect to be significant, the Lehman would have to be constructed with the=20
magnet on the arm, and we weren't given that information.
My point is that there is such a huge ratio between the diamagnetic=20
susceptability of oil and the ferromagnetic susceptability of iron that the=20
oil could not have any effect.
I don't discount the gravitational attraction. G=3D 6.67x10^ -11 m^3 / K=
g=20
s^-2 according to my quick calculations. Force F newtons =3D GxM1xM2/ d^2 wh=
ere=20
M's are in Kg and d is in m.
=20
Regards, Chris Chapman
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Larry Cochrane <cochrane@..............>