If the metal coefficient of cubical expansion 7.2e-6 / C. What will be its coefficient of superficial expansion?

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If the metal coefficient of cubical expansion 7.2e-6 / C. What will be its coefficient of superficial expansion?

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Answer 1 · 2016-10-12T11:12:51

We know that three coefficients of expansion linear ( $α$ $alpha$ ),superficial ( $β$ $beta$ )and cubical ( $γ$ $gamma$ ) are related as follows

( $α = \frac{β}{2} = \frac{γ}{3}$ $alpha=beta/2=gamma/3$ )

$\Rightarrow β = \frac{2 γ}{3} = \frac{2}{3} \times 7.2 \times 20^{- 6} /^{\circ} C$ $=>beta=(2gamma)/3=2/3xx7.2xx20^(-6)"/"^@C$
$= 4.8 \times 10^{- 6} /^{\circ} C$ $=4.8xx10^(-6)"/"^@C$

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If the metal coefficient of cubical expansion 7.2e-6 / C. What will be its coefficient of superficial expansion?

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