An 8 000-Kg Aluminum Flagpole 100-M Long Is Heated by the Sun

question 30

Multiple Choice

An 8 000-kg aluminum flagpole 100-m long is heated by the sun from a temperature of 10°C to 20°C. Find the work done (in J) by the aluminum if the linear expansion coefficient is 24 × 10−⁶ (°C) −¹. (The density of aluminum is 2.7 × 10³ kg/m³ and 1 atm = 1.0 × 10⁵ N/m².)

• A) 287
• B) 425
• C) 213
• D) 710
• E) 626

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Definitions:

Priming

The process by which exposure to a stimulus influences a response to a subsequent stimulus, without conscious guidance or intention.

Savings Method

A technique in psychology to measure the retention of learned material over time by assessing the amount of review required to relearn it.

False Positive

An error in data reporting in which a test result improperly indicates the presence of a condition (like a disease) when it is not actually present.

Eyewitnesses

Individuals who have directly seen an event or crime take place and can provide testimony about what they observed.