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

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Definitions:

Demand Curve

A graphical representation of the relationship between the price of a good and the quantity of it that consumers are willing to purchase at various prices.

Total Revenue

The total income received by a company from its sales of goods or services before any expenses are subtracted.

Output Range

The spectrum of quantities of goods or services that a company can produce under certain conditions or within a specified period.

Elastic Demand

Refers to a market scenario where the quantity demanded of a product changes significantly when its price changes.