A force of 20 N is applied to a wire with an un-stretched length of 2.5 m.The wire gets 2.00 mm longer.The strain in the wire is A) 2.0 $\times$ 10^-4. B) 4.0 $\times$ 10^-4. C) 6.0 $\times$ 10^-4. D) 8.0 $\times$ 10^-4. E) 10 $\times$ 10^-4.

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The Answer of A force of 20 N is applied to a wire with an un-stretched length of 2.5 m.The wire gets 2.00 mm longer.The strain in the wire is A) 2.0 $\times$ 10^-4. B) 4.0 $\times$ 10^-4. C) 6.0 $\times$ 10^-4. D) 8.0 $\times$ 10^-4. E) 10 $\times$ 10^-4.

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