a bridge 2 kg in length is made out of steel (average coefficient of liner expan

Question

a bridge 2 kg in length is made out of steel (average coefficient of liner expansion=1.1x10^5) if the local daily variation in temperture can exceed 20 c the approximate resulting change in thr bridhge length is A 4.4 mm B. 4.4 cm C. 44 cm D. 4.4 m E. 44m a bridge 2 kg in length is made out of steel (average coefficient of liner expansion=1.1x10^5) if the local daily variation in temperture can exceed 20 c the approximate resulting change in thr bridhge length is A 4.4 mm B. 4.4 cm C. 44 cm D. 4.4 m E. 44m a bridge 2 kg in length is made out of steel (average coefficient of liner expansion=1.1x10^5) if the local daily variation in temperture can exceed 20 c the approximate resulting change in thr bridhge length is A 4.4 mm B. 4.4 cm C. 44 cm D. 4.4 m E. 44m

Explanation / Answer

length due to thermal expansion = Lactual * (1 + alpha * dT )

alpha = coefficient of friction

dT = temprature variation

L = 2 (1+ 1.1*10^(-5) * 20) = 2.00044 km = > change of 0.00044 km = > 0.44 m =>

{ C. 44 cm }

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