A steel wire,86.0 m long at 21°C,has a coefficient of linear expansion of 11 × 10−⁶/C°.Give its change in length as the temperature changes from 21°C to 36°C. A)2.0 cm B)3.4 cm C)1.4 cm D)0.21 cm E)6.3 cm

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Quizplus · Accepted Answer

The change in length can be calculated using the formula ΔL = L₀αΔT, where L₀ is the original length, α is the coefficient of linear expansion, and ΔT is the change in temperature. Substituting the given values: ΔL = 86.0 m * 11 × 10⁻⁶ /°C * (36°C - 21°C) = 0.01419 m = 1.4 cm.

A Steel Wire,86