Solve the following examples.
Given data:
● Length of iron rods = 20 m
● The temperature of bridge = 18°C
● Distance between rods = 0.4 cm
Calculation:
The expression to calculate the final temperature in linear expansion of solid is as follows.
● 
= temperature up to which bridge be in good shape
● 
= The initial temperature of brthe idge
● 
= change in length
● 
= original length of iron rod
● 
= The coefficient of linear expansion of iron. Its value is 11.5×10-6 °C.
Substitutes the given values and value of 
in the above equation.
= 35.4 
The maximum temperature up to which the bridge be in good shape is 35.4
.
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