1. You'd better check your numbers. If the copper rod starts out 8 times longer, no amount of heating (or cooling) is going to make it shorter than the steel rod.
Is your 800.1 cm supposed to be 100.1 cm?
1..........At what temperature of 0^C steel rod & copper rod have length of 800.1cm and 99.9cm respectively. At what temperature will the 2 rods have the same length.
Coefficients of linear expansion (per °C) copper rod----.000017 steel rod-------.000012
2.....The length of a brass bar increase from 4.001m into 4.0030 m. find the final temperature of the bar if the initial temperature was 0 Celsius.
Coefficients of linear expansion (per °C) brass----- .000019
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