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 0.000012C−1.
0.18cm
1.80cm
18.00cm
1800cm
Correct answer is C
α = extensionLΔθ
0.000012 = e600×(35−10
= 0.18m
= (0.18 x 100) cm
= 18.0 cm
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