Question

3.
A bar of iron is 10 cm at 20°C. At 19°C it will be (aFe = 11 * 10-6/°C)
(1) 11 * 10-6 cm longer
(2) 11 x 10-6 cm shorter
(3) 11 * 10-5 cm shorter
(4) 11 x 10-5 cm longer​

Answer 1

Answer:

(3) 11*10^-5 cm shorter

Explanation:

(refer to the attached image)