An iron rod is 1.58 m long at 0°c. what must
be the length of a brass rod at 0°c if the
difference between the lengths of the two rods
is to remain the same at all temperatures.
linear expansivity of iron = 1.2 x 10-5 k-1
linear expansivity of brass = 1.9 x 10-5 k-1.

this urgent

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