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The bulk of modulus of a metal is 10^(10...

The bulk of modulus of a metal is `10^(10)(N)/(m^2)` and Poisson's ratio `0.20`. If average distance between the molecules is `3Å` the the interatomic force constant is

A

5.4 N/m

B

7.5 N/m

C

75 N/m

D

30 N/m

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The correct Answer is:
A
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