A metal rod 800mm long is heated from 10oC to 95oC. If it expands by 1.36mm, the linear expansivity of the metal is
A
2.0 x 102K-1
B
2.0 x 102K-1
C
5.0 x 10-3K-1
D
2.0 x 10-5K-1
Verified Correct Answer: D.
Physical Principles & Numerical Solution
a = \(\frac{1.36}{800 \times (95 - 10)}\)
= 2.0 x 10-5K-1
Source: Myschool Past Questions Archive (Record #27978)