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October 21, 2014

October 21, 2014

Posted by **kalawathi** on Monday, February 4, 2013 at 1:52am.

N/m^2,Y for aluminum=0.70*10^11 N/m^2).

ans:

1)189:110

- PHYSICS -
**drwls**, Monday, February 4, 2013 at 6:07amX = Length increase = L*Force/(Area)(Y)

Y is Young's modulus

X(copper)/X(aluminum) = (3/2)*(4/5)/[(2/3)^2*(1.1/.7]

= 1.718

which happens to equal 189/110

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