Thermal Expansion: a Rod Has a Length 2

Multiple Choice

Thermal expansion: A rod has a length 2.00000 m at 10.0°C. The length of the rod increases to 2.00060 m when the temperature increases to 30.0°C. What is the coefficient of linear expansion of the material from which the rod is made?

A) 2.0 × 10^-5 K^-1
B) 2.5 × 10^-5 K^-1
C) 1.5 × 10^-5 K^-1
D) 1.0 × 10^-3 K^-1
E) 1.0 × 10^-5 K^-1