The length of an aluminium bar of lenght 80 cm increases by 1 mm on heating. What is the final
temperature of the bar if it was initially at temperature 20 oC? (Given : Coefficient of linear
expansion of aluminium = 25 x 10-6 /
o
c )
premkumar1230:
details please
change in length / original length= coefficient of linear expansion × increase in time
Change in length is 1 mm = 0.1 cm and original length was 80 cm
let increase in time "t"
then after finding "t"
from above formula
find t+20= final temperature
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ans is 70°c
hope this will help you
hope this will help you
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