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A cube is subjected to a uniform volume compression. If the side of the cube decreases by $2 \%$ the bulk strain is
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0.06
\(\begin{aligned} \frac{\Delta a}{d} &=2 \% \\ v &=a^{3} \\ \frac{\Delta v}{v} &=3 \frac{\Delta a}{d} \\ &=6 \% \\ &=0.06 \end{aligned}\)
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