A bridge is made from 20m long iron rods . At temperature 18°C , the distance between two rods is 0.4cm . Upto what temperature will the bridge be in good condition ??
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Answer:
temperature = 35.4 c
step by step explanation:
it is given that the length of the rods = 20m = 2000 cm, temperature t = 18 c, and the distance between the two rods is 0.4 cm.
it is required to find the maximum temperature at the bridge is still in a good shape.
the bridge will be in a good shape until the two rods expand by 0.2 cm each as the temperature increases. therefore, let the total expansion be 0.4 cm (2*0.2 cm)
the formula of linear expansion is:
; where is the expansion in the length, is the length of the rod, is the linear expansion coefficient of iron ()Explanation:
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