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(a) Suppose a meter stick made of steel and one made of invar (an alloy of iron and nickel) are the same length at 0°C. What

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a Difference in Length AL = AL = L (ds-di) AT OL= 1 x (12x10 -6 6.9x1066)x (20-0) AL= 0.222 222 x 103 m 6.222 mm 61 AL = 34 x

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