A brass rod is 2m long at a certain temperature. What is the length for a temperature rise of 100K, if the expansivity of brass is 18 x 10-6K-1?

A.

2.0036m

B.

2.0018cm

C.

2.1800

D.

2.0360m

View answer & explanation

Correct answer is A

\(\alpha\) = \(\frac{L_2 - L_1}{L_1 \times \Delta \theta}\)

18 x 10-6 = \(\frac{L_2 - 2}{2\times 100}\)

L = 2.0036m

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