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A bridge made of steel is 600m long. What is the daily va...

A bridge made of steel is 600m long. What is the daily variation in its length if the night-time and daytime temperatures are 10°C and 35°C respectively. The linear expansivity of steel is 0.000012C1.

A.

0.18cm

B.

1.80cm

C.

18.00cm

D.

1800cm

Correct answer is C

α = extensionLΔθ

0.000012 = e600×(3510

= 0.18m

= (0.18 x 100) cm

= 18.0 cm