Question

an aluminium rod when measured with a steel scale, both being at 25 degree C appears to be one meter long. if the scale is correct at 0 degree C .what is the true length of rod at 25 degree C? what will be the length of the rod at 0 degree C?
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Answer 1

Answer:

steel scale is correct at

. The length of a brass tube measured by it at

is

. The correct length of the tube at

is (Coefficients of linear expansion of steel and brass are

Answer 2

Answer:

steel scale is correct at

. The length of a brass tube measured by it at

is

. The correct length of the tube at

is (Coefficients of linear expansion of steel and brass are