Heat and Thermal ExpansionHard
Question
A steel scale measure the length of a copper rod as l0 when both are at 20oC, which is the calibration temperature for the scale. The scale reading when both are at 40oC, is :-
Options
A.(1 + 20αC) lo
B.(1 + 20αS) lo
C.
D.
Solution
lo (1 + 20αC) = l1 (1 + 20αS) ⇒ l1 =
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