A metal rod of Young's modulus \[2\times {{10}^{10}}N{{m}^{-2}}\] unde – McqOptions

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1.	A metal rod of Young's modulus \[2\times {{10}^{10}}N{{m}^{-2}}\] undergoes an elastic strain of 0.06%. The energy per unit volume stored in J m-3 is
A.	3600
B.	7200
C.	10800
D.	14400
Answer» B. 7200

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