- #1

Dr.Wasim

- 12

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## Homework Statement

A steel rod 4.00 cm in diameter is heated so that its temperature increases by 70.0 C. it is then fastened between tow rigid supports. The rod is allowed to cool to its original temperature. Assuming that Young's modulus for the steel is 20.6 * 10^10 N/m^2

and that its avarege coefficient of linear expansion is 11 * 10^-6 1/C , Calculate the

tension in the rod.

## Homework Equations

Delta L = L1 * alfa ( avarege coefficient of linear expansion ) * delta T

and

F / A = Y delta L / L

## The Attempt at a Solution

I found delta L / L from first law above

then i found tension from second law

Is this true ?? please i need the answer today

Best wishes for you