A rod of initial lenght 2m at a temperature of 25oC is heated to 80oC....

WAEC 2009

A rod of initial lenght 2m at a temperature of 25^oC is heated to 80^oC. Calculate the increase in length of the rod if its linear expansivity is 4.0 x 10^-3K^-1

A. 0.26m
B. 0.44m
C. 0.53m
D. 0.84m

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Correct Answer: Option B

Explanation

\(l_2 - l_1 = \alpha l_1 (\theta_2 - \theta_1) = 4.0 \times 10^{-3} \times 2(80 - 25)\)

= 0.44m

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A rod of initial lenght 2m at a temperature of 25oC is heated to 80oC....

Correct Answer: Option B

Explanation

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