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15 January, 05:04

perature is 0◦F. How much taller is the building when the temperature is 107◦F? The linear expansion coefficient of steel is 1.1 * 10-5 (◦C) - 1.

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  1. 15 January, 07:09
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    1.000458 m taller.

    Explanation:

    coefficient of Linear Expansion (∝) = (L₂ - L₁) / L₁ΔT

    Where ∝ = coefficient of Linear Expansion, L₂ = Final length (m), L₁ = initial length (m), ΔT = Change in temperature (◦C⁻¹) = T₂ - T₁

    ∴ ∝ = L₂ - L₁/L₁ΔT

    Making L₂ the subject of the formula in the equation above,

    L₂ = L₁ + (1 + ∝ ΔT)

    L₂ - L₁ (ΔL) = (1 + ∝ ΔT) ... equation 1

    Where L₁ = 222 m, ∝ of steel = 1.1 * 10-5 ◦C⁻¹, and ΔT = 107 - 0 = 107◦F

    Coversion: (°F - 32) x 5/9 = °C

    °C = (107 - 32) * 5/9 = (75 * 5) / 9 = 41.66◦C

    Substituting this values into equation 1

    ΔL = 1 + (1.1*10⁻⁶ * 41.66) = 1 + 0.000458

    ΔL = 1.000458 m.

    Therefore The building is 1.000458 m taller.
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