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Re: Trouble with "flexure of beams" apparatus



At 02:18 PM 12/8/00 -0600, Lemmerhirt, Fred wrote:
>Young's modulus... one method is giving results in the 3.3 to 3.8 (times
>some power of 10) range while the other gives values in the 1.8 to 2.2
>range.

Once you have a putative value for Young's modulus you have an equation in
ZERO unknowns that predicts the flexion in terms of the load and other
measured parameters. Take any one of the measured data points and see if
this equation is satisfied. If not, try the other putative value.

For that matter, once you have an estimate for the correct value, plug
_all_ the measured points into the equation and see how much scatter there is.