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September 21, 2014

September 21, 2014

Posted by **Johnson** on Friday, April 11, 2008 at 4:50am.

- Physics -
**drwls**, Friday, April 11, 2008 at 7:04amSet the (negative) thermal expansion equal per unit length to the strain due to tension.

alpha*(delta T) = (F/A)/Y

Y = (F/A)/[(delta T)*alpha]

Y is Young's modulus

A is the cross sectional area, 1.5*10^-5 m^2

delta T = 41 C

F = 1200 N

alpha = 2.1*10^-5 C^-1 is the coefficient of thermal expansion

Solve for Y

- Physics -
**Johnson**, Friday, April 11, 2008 at 3:52pmthat's what I have been working and keep coming up with either two answers 9.29 or 9.29 * 10 ^10 and the computer is telling me its wrong I don't know what else to do. Maybe I'm computing the number wrong.

- Physics -
- Physics -
**drwls**, Saturday, April 12, 2008 at 12:46amI also get 9.29*10^10 N/m^2. That is a typical value for a metal.

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