- #1
chetzread
- 801
- 1
Homework Statement
in the notes , i was told that ∂A is the resistance of aluminium rod...I'm wondering the change length of steel rod that we can 'see' is ∂ st or ∂T(st) ?
Homework Equations
The Attempt at a Solution
I think the change length of steel rod that we can 'see' is ∂ st ?