1.

The temperature perturbation at all the surface has penetrated to the depth (Where, T is time constant and α is thermal diffusivity.)

A. 1.6 (α T)^1/2
B. 2.6 (α T)^1/2
C. 3.6 (α T)^1/2
D. 4.6 (α T)^1/2
Answer» D. 4.6 (α T)^1/2


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