A steel tape placed around the earth at the equator when the temperature is `10^(@)C`. What will be
Channel: Doubtnut
Date: 2020-01-28

A steel tape placed around the earth at the equator when the temperature is `10^(@)C`. What will be the clearance between the tape and the ground (assumed to be uniform) if the temperature of the tape rises to `40^(@)C`? Neglect expansion of the earth. Radius of earth at equator is `6400`km & ` alpha_(steel)= 1.2 xx 10^(-5)K^(-1)`