A long steel beam has a length of twenty-eight meters on a cold day when the temperature is 0°C.What is the length of the beam on a hot day when T = 39°C? (α_steel = 1.1 × 10−⁵/C°) A)28.009 m B)28.015 m C)28.012 m D)28.036 m E)28.004 m

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Quizplus · Accepted Answer

The change in length due to thermal expansion is calculated using the formula ΔL = αL₀ΔT. Here, ΔL = 1.1 × 10⁻⁵ × 28 × 39 = 0.012012 m. The new length is 28 + 0.012012 = 28.012 m.

A Long Steel Beam Has a Length of Twenty-Eight Meters