Questions
A metal rod has a length of 1m at , of metal is , the temperature at which it will be shortened by 1mm is
detailed solution
Correct option is C
coefficient of linear expansion of solid isα=ΔllΔthere Δl =-1mm=-10-3m=decrease in lengthl is initial length=1m; Δt is change in temperature;initial temperature = 300C; α=2.5x10-5/C 0 substitute given values in above equation2.5×10−5=−10−31×t2−30t2−30=−12.5×10−2=−1002.5t2−30=−40t2=−40+30=−100C=temperature at which rod will be shortenedTalk to our academic expert!
Similar Questions
The coefficient of linear expansion of brass and steel are and . If we take a brass rod of length and steel rod of length at 0oC, their difference in length will remain the same at all temperatures if
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