The volume of a metal block changes by 0.18% when it is heated through 20 °C. Its coefficient at cubical expansion will be
A. 9 × 10-5 / °C
B. 3 × 10-5 / °C
C. 18 × 10-5 / °C
D. 36 × 10-5 / °C
Answer:A
The volume of a metal block changes by 0.18% when it is heated through 20 °C. Its coefficient at cubical expansion will be
A. 9 × 10-5 / °C B. 3 × 10-5 / °C C. 18 × 10-5 / °C D. 36 × 10-5 / °C