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2015-04-23T14:22:29+05:30

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     When pressure P (= stress = Force/Area) is applied on the surface of the cube, it is compressed. The compression is due to elasticity.  Let Y be the Young's modulus of elasticity of the material of the cube.

When the cube is heated,  it expands due to increase in temperature.  Let α be the coefficient of thermal expansion of the material.  Let L be the side of the cube.

   Y = Stress / Strain
       = P / (ΔL / L)
   ΔL = compression = P L / Y
 
   ΔL = α L T

  Hence,  α L T = P L / Y 

         =>  T = P / α Y

2 5 2
which class question is this ?
which class r u in? just for information only
12th ....why ?