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

---

Definitions:

Community Setting

A social environment where individuals live, interact, and engage in daily activities outside of institutional or hospital-based settings, often focusing on the broader social and community context.

Short-term Hospitalization

A brief period of medical or psychiatric treatment and care in a hospital setting.

Institutionalization

The process of embedding something within an organization, social system, or society, making it a permanent feature.

Aftercare

Support or care provided after the initial treatment of an illness or discharge from a facility, aiming to assist in recovery or manage symptoms.