A steel bar has length of 3 × 10² m, heated from 20°C to 120°C. If the length coefficient expansion is 1,2 × 10^-5 / °C and the length of steel to be affected b
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Pertanyaan
A steel bar has length of 3 × 10² m, heated from 20°C to 120°C. If the length coefficient expansion is 1,2 × 10^-5 / °C and the length of steel to be affected by the first length, temperature changing and length linear coefficient expansion. Calculate the length of the end of the steel!
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1. Jawaban ShanedizzySukardi
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Lo = 3 x 10² m
Δt = 120°C - 20°C = 100°C
α = 1,2 x 10⁻⁵/°C
Lt = ... ?
Problem solving:
Lt = Lo (1 + α x Δt)
Lt = 3 x 10² (1 + 1,2 x 10⁻⁵ x 100)
Lt = 3 x 10² (1 + 1,2 x 10⁻³)
Lt = 3 x 10² (1 + 0,0012)
Lt = (3 x 10²)(1,0012)
Lt = 300,36 mPertanyaan Lainnya
