Question

Can someone explain to me what goes where? I'm not sure how to solve this.....
A metal rod is 25.000cm long at 25.0 degrees Celsius. When heated to 102.0 degrees Celsius, it is 25.054 cm long. What is the coefficient of linear expansion for this metal?

Answer 1

don't remember exactly but
as the temperature goes up the length goes up
change in length relates directly to the temperature
change in temp = 102 - 25 = 77 degrees
change in length = 25.054 - 25.000 = 0.054cm
for a change of 77 degrees the length changes 0.054 cm
so for 1 degree it changes by 0.054/77 = 7*10^-4cm

Answer 2

more realistic unit of measure is mm
10 mm = 1 cm
expansion is 0.007mm per degree.

Answer 3

Thank you but I someone explained it to me, like what goes where an I was able to do it myself its 2.805E-5 but thank you :)