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Q.

What is the stress developed inside a tooth cavity filled with copper when hot tea at temperature of 57C is drunk. You can take body (tooth) temperature to be 37C and α=1.7×105/C, bulk modulus for copper =140×109N/m2.

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a

1.428×1010N/m2

b

1.428×108N/m2

c

1.428×109N/m2

d

1.428×1011N/m2

answer is A.

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Detailed Solution

Stress=B × volume strain =B(ΔVV)=B(3αΔT)

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