Modern Railway Tracks Consist of Continuous Welded-Steel Rails of 1 $\times$

question 2

Multiple Choice

Modern railway tracks consist of continuous welded-steel rails of 1.0-km lengths.If the coefficient of linear expansion of steel is 11 $\times$ 10^-6 K^-1,by how much would such a rail change in length between the highest summer temperature (40ºC) and the lowest winter temperature (-40ºC) ?

• A)44 cm
• B)88 cm
• C)0.88 mm
• D)1.8 mm
• E)4.4 cm

Understand the concept and impact of big data on businesses.

Recognize the effectiveness of mobile marketing research.

Identify the role of whistleblowers in maintaining ethical practices within a company.

Evaluate advertising and promotional efforts through specific research methods.

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Definitions:

Exaggerated Opinion

A belief or judgment that goes beyond the evidence or facts, typically more extreme or stronger than what is warranted.

Inferiority Complex

A psychological condition where a person believes they are less worthy, capable, or significant than others, often leading to overcompensation or withdrawal.

Youngest Children

In family dynamics, the youngest offspring, who may experience different parental expectations and family roles compared to their older siblings, potentially impacting their personality development.

Commonsense Observations

Practical judgments and experiences that are perceived as plain or sound, typically based on everyday life.