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
Verified Correct Answer: A.
Physical Principles & Numerical Solution
\(\alpha\) = \(\frac{L_2 - L_1}{L_1 \times \Delta \theta}\)
18 x 10-6 = \(\frac{L_2 - 2}{2\times 100}\)
L = 2.0036m
Source: Myschool Past Questions Archive (Record #28173)