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101. If the interatomic spacing in a steel wire

If the interatomic spacing in a steel wire is 3.0Å and  Ysteel =20×1010 N/m2   then force constant is

(a) 6×10-2 N/Å                       (b)  6×10-9 N/Å

(c)  4×10-5 N/Å                      (d)  6×10-5 N/Å

Answer-b

(19)

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