1. Brass wire is 0.5 m long at 20 •C. If heated to 50 •C, what is the change in length?

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Chapter13: Temperature, Kinetic Theory, And The Gas Laws
Section: Chapter Questions
Problem 11PE: What is the change in length of a 3.00mlong column of mercury if its temperature changes from 37.0C...
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1. Brass wire is 0.5 m
long at 20 •C. If heated to 50 •C, what is the change in
length?
Transcribed Image Text:1. Brass wire is 0.5 m long at 20 •C. If heated to 50 •C, what is the change in length?
A steel beam used in the construction of a bridge is 9.2 m long at 20 •C. On a hot
summer day, the temperature increases to 40 C. What is the change in length
due to linear expansion?
Solution:
Given: L = 9.2 m
AT= T2-T1 = 40 °C – 20 •C = 20 •C
a= 1.2 X 10 -5 C -1
AL = L,aAT
Solution:
%3D
= (9.2 m) (1.2 X 10 -5 •C -1)( 20 •C)
= 2.2 x 10 -3 m
Transcribed Image Text:A steel beam used in the construction of a bridge is 9.2 m long at 20 •C. On a hot summer day, the temperature increases to 40 C. What is the change in length due to linear expansion? Solution: Given: L = 9.2 m AT= T2-T1 = 40 °C – 20 •C = 20 •C a= 1.2 X 10 -5 C -1 AL = L,aAT Solution: %3D = (9.2 m) (1.2 X 10 -5 •C -1)( 20 •C) = 2.2 x 10 -3 m
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