The mean distance between the atoms of iron is \( 3 \times 10^{-10} \mathrm{~m} \) and interatom...

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The mean distance between the atoms of iron is \( 3 \times 10^{-10} \mathrm{~m} \) and interatomic force constant for iron is \( 7 \mathrm{~N} / \mathrm{m} \). The Youngs modulus of elasticity for iron is
(a) \( 2.33 \times 10^{5} \mathrm{~N} / \mathrm{m}^{2} \)
(b) \( 23.3 \times 10^{10} \mathrm{~N} / \mathrm{m}^{2} \)
(c) \( 233 \times 10^{10} \mathrm{~N} / \mathrm{m}^{2} \)
(d) \( 2.33 \times 10^{10} \mathrm{~N} / \mathrm{m}^{2} \)
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