A wire 3.00 m long and .450 mm2 in cross-sectional area has a resistance of 41.0Ω at 20 degrees C. If its resistance increases to 41.4Ω at 29.0 C, what is the temperature coefficient of resistivity?

Answer 1

why are you posting under different names?

changeresistane=tempcoeff*deltTemp
.4=tempcoeff*9C

solve for tempcoefficent

Answer 2

oh its a group of six friends working together and i didn't know they all posted it twice...sorry about that