Thermal Expansion: a Certain Metal Has a Coefficient of Linear

question 60

Multiple Choice

Thermal expansion: A certain metal has a coefficient of linear expansion of 2.00 × 10^-5 K^-1. It has been kept in a laboratory oven at 325°C for a long time. It is now removed from the oven and placed in a freezer at -145°C. After it has reached freezer temperature, the percent change in its density during this process is closest to

• A) +2.90%.
• B) -2.90%.
• C) +2.74%.
• D) -2.74%.
• E) It is not possible to tell without knowing the mass and original volume of the metal.

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Definitions:

Standard Deviation

A measure of the amount of variation or dispersion of a set of values; a low standard deviation indicates that the values are close to the mean.

Population

The complete set of items or individuals that are the objects of a statistical study.

Simple Random Sample

A subset of a larger population in which every member has an equal chance of being selected, ensuring the sample’s representativeness.

Annual Salary

The total amount of money that an individual earns in one year from their job before taxes and other deductions.