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Posted: **Sat May 21, 2022 10:56 am**

: C The Length Of A Steel Length Bar Of Nominal Length 100 Mm Is Measured Using A Set Of Callipers The Room In Which Th 1 (30.57 KiB) Viewed 14 times

: C The Length Of A Steel Length Bar Of Nominal Length 100 Mm Is Measured Using A Set Of Callipers The Room In Which Th 2 (23.04 KiB) Viewed 14 times

(c) The length of a steel length bar of nominal length 100 mm is measured using a set of callipers. The room in which the measurement is made is kept at a temperature of 2011 C. Given the thermal expansion coefficient of the length bar is 11 x 10-6K1, what is the standard uncertainty in the length due to thermal expansion?
• L = Lo(1 + αΔt) u(L) = cu(Δt) - al ΟΔt -u(Δt) al ΟΔt = 2 - Lρα • u(Δt) = = 5 u(t) = Lραμ (Δt) = 100 x 10-3 x 11 x 10-6 x V12 3 1 . X = 0.64 μm