A) Suppose a meter stick made of steel and one made of invar are the same length at 0°C. What is their differe?
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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 51.0°C? __________________ mm (b) Repeat the ...show more
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Answer:
There are many different types of steel. I'll pick this one: linear thermal expansion coef steel: 13e-6 m/m K invar: 1.5e-6 m/m K ∆L/L = α∆T, α is linear thermal expansion coef L = L₀(1 + α∆T) steel: L = 1(1 + (13e-6)(51)) = 1.000663 invar: L = 1(1 + (1.5e-6)(51)) = 1.0000765 diff is 0.000587 m or 587 µm b) need to know what the tapes are made of. If the same material, the diff is zero.
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