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Physics
Physics
Problem
The amount of elastic potential energy stored per unit volume (in SI unit) in a steel wire of length 50 cm when it is stretched by 2 mm is. (If Young's modulus of the wire =
2.0
×
10
11
N m
−
2
2.0 \times 10^{11} \text{ N m}^{-2}
2.0
×
1
0
11
N m
−
2
)
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