41. A wire of length L, Young’s modulus Y, and cross-sectional area A is stretched elastically by an amount ∆L . It behaves as a spring by using the Hooke’s law. What is the work done in stretching the wire by an amount ∆L? (A) (B) (C) (D) (E)
41. A wire of length L, Young’s modulus ..-阿摩線上測驗
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