A Piece of Metal 0 $\circ$ C and Is Stretched by a Force of 95

question 17

Multiple Choice

A piece of metal 0.12 m² in cross sectional area is cooled by 30 ^$\circ$ C and is stretched by a force of 95 * 10⁵ N.If the fractional change in length is 1.12 * 10^-3,what is Young's modulus for the metal? ( $\alpha$ = 19 * 10^-6 C^-1)

• A)4.7 * 10¹⁰ N/m²
• B)8.3 * 10¹⁰ N/m²
• C)6.2 * 10¹⁰ N/m²
• D)5.8 * 10¹⁰ N/m²
• E)9.0 * 10¹⁰ N/m²

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