A Steel String Guitar Is Strung So That There Is

question 15

Multiple Choice

A steel string guitar is strung so that there is negligible tension in the strings at a temperature of 24.9 °C. The guitar is taken to an outdoor winter concert where the temperature of the strings decreases to -15.1 °C. The cross-sectional area of a particular string is 5.5 × 10^-6 m². The distance between the points where the string is attached does not change. For steel, Young's modulus is 2.0 × 10¹¹ N/m²; and the coefficient of linear expansion is 1.2 × 10^-5/C°. Use your knowledge of linear thermal expansion and stress to calculate the tension in the string at the concert.

• A)530 N
• B)240 N
• C)120 N
• D)60 N
• E)30 N

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