A substance breaks down by a stress of $10^6 N/m^2$. If the density of the material of the wire is $3×10^3 kg/m^3$, then the length of the wire of the substance which will break under its own weight when suspended vertically, is ......... $m$
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(c) $L = \frac{p}{{dg}} = \frac{{{{10}^6}}}{{3 \times {{10}^3} \times 10}} = \frac{{100}}{3} = 33.3m$
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