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(a) Suppose a meter stick made of steel and one made of invar are the same...

(a) Suppose a meter stick made of steel and one made of invar are the same length at 0°C. What is their difference in length at 21.5°C? The coefficient of thermal expansion is 12 ✕ 10−6/°C for steel and 0.9 ✕ 10−6/°C for invar.

(b) Repeat the calculation for two 20.5-m-long surveyor's tapes.

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genius_generous answered 5 months ago
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