A rail of length 15.05m increases to 15.10m when heated from 20(degree centigrade) to 41(degree centigrade). Calculate its linear expansivity
Linear expansivity = (change in length/original length) / (change in temperature)
Linear expansivity = (0.05m/15.05m) / (41-20)
Linear expansivity = 0.0013/21
Linear expansivity = 0.000062 m/°C
Amazing how the robot tutor cannot do simple arithmetic
and consistently gives wrong answers.
(0.05m/15.05m) / (41-20)
= .003322/21 , not .0012/21
= .000158 , not .000062