A steel scale measures the length of a copper wire as 80.0 cm when both are at 20∘C (the calibration temperature for scale). What would be the scale read for the length of the wire when both are at 40C? (Given αsteel=11×10−6 per0 C αcopper=17×10−6 per 0C)

A steel scale measures the length of a copper wire as 80.0 cm when bot

1.	A steel scale measures the length of a copper wire as 80.0 cm when both are at 20∘C (the calibration temperature for scale). What would be the scale read for the length of the wire when both are at 40C? (Given αsteel=11×10−6 per0 C αcopper=17×10−6 per 0C)
Answer» A steel scale measures the length of a copper wire as 80.0 cm when both are at $20^{\circ} C$ (the calibration temperature for scale). What would be the scale read for the length of the wire when both are at 40C? $(G i v e n α_{s t e e l} = 11 \times 10 - 6 p e r^{0} C$ $α_{c o p p e r} = 17 \times 10^{- 6} p e r^{0} C)$