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brian!
I thought my assumption was only for the purpose of analyzing the equal
arm balance.
bc
brian whatcott wrote:
At 22:54 9/28/01 -0700, Bernard wrote:
I thought we assumed g was uniform?
bc
[I cleaned up the visible snarl ups in the note below]
I'd say it's much better to assume that g varies from place
in a somewhat noisy way, but with two prime features that
are easily extracted from the noise by high-scholars:
latitude and elevation.
If you can be happy with a fair estimator for the sea level value
of g with latitude, you could go with
g = g sub 45,0 *(1 - 2.59E-3 cos(2*lat)) N/kg
for g sub 45,0 (the sea level value for lat 45 deg) = 9.80665 N/kg
which is popular in some academic circles.
It turns out that at sea level, if you want to stay with
a customary value of g = 9.81 N/kg (i.e. 9.805 to 9.8149 N/kg)
you would preferably be in the locality of Lat N54 deg 36 min
to Lat N35 deg 24 min according to this estimator.