Analysis for Oil

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The only equation that is truly needed to solve this problem is




Once we know the slope, (which in this case is \frac{F_b}{H}), we can set the slope equal to \rho_fg\pi r^2

However, in this case it is convenient to multiply the slope by 100 to change it to N/M. This, coupled with changing the measured radius to meters, will give a final result in KG/M


m= 2.502 N/cm

r=.0095 M



m=\rho_fg\pi r^2


\frac{m}{g\pi r^2}=\rho_f


with units:





From this, our percent error is



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