Question

The figure shows two identical metal bars are different temperatures. What is the

Answer 1

The coefficient of thermal expansion of the metal will be 1.4 x 10⁻⁵ °c.

What is thermal expansion?

Every material has its property of contraction or expansion by the change of temperature. The expansion and contraction of any material are indicated by a coefficient this coefficient is called the coefficient of thermal expansion.

Here we have the following data:-

l₁= 1.000 m

l₂ = 1.001 m

Δ = 70° C

The formula for calculating the coefficient of linear expansion will be:-

$\alpha =\dfrac{\Delta l}{\Delta t\times l}$

By putting the values we will get the answer.

$\alpha=\dfrac{0.0001}{70\times 1}= 1.4\times 10^{-5}$

Therefore the coefficient of thermal expansion of the metal will be 1.4 x 10⁻⁵ °c.

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