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

question 31

Multiple Choice

A piece of brass 0.12 m² in cross sectional area is cooled by 30 ^$\circ$ C and is stretched by a force.If the fractional change in length is 1.12 * 10^-3,what is the magnitude of the force? ( $\alpha$ _Brass = 19 * 10^-6 C^-1,Y_Brass = 9.0 * 10¹⁰ N/m²)

• A)18 * 10⁶ N
• B)52 * 10⁵ N
• C)74 * 10⁵ N
• D)78 * 10⁶ N
• E)95 * 10⁵ N

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Definitions:

Price Index

A statistical measure that examines the weighted average of prices of a basket of consumer goods and services, showing trends over time.

Base Year

A specific year against which economic, financial, or statistical data is standardized or indexed, allowing for comparison over time.

Consumer Price Index

The Consumer Price Index (CPI) measures the average change over time in the prices paid by urban consumers for a basket of consumer goods and services.

Inflation Rate

The pace at which the overall price level for goods and services increases, diminishing the buying power.