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Dec 25, 2010
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  1. Medical Student
I feel pretty dumb for asking this but anyways...


why is the value for area 5.0x10^-4? Don't they tell you that the cross sectional area is 5.0 cm...which should be 5.0x10^-2m..no?


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May 22, 2011
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I got this one wrong too! Didn't even think about it- just glanced at the answer and figured I'd made a stupid calculation error. Now that you've pointed it out, yeah, what gives!?
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Dec 1, 2011
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  1. Pre-Podiatry
Always had a hard time with this. It helps to write it out a few times until you get used to it.

(5cm^2)*(10^-2m/cm) = 5*10-2cm*m

(5*10^-2cm*m)*(10^-2m/cm) = 5*10^-4m^2
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