# PHYSICS

posted by
**EM**
.

1...At what temp. of 0^C steel rod and copper rod have length of 800.1 & 99.9 respectively. At what temp. will the 2 rods have the same length.

coeff.of linear expansion Copper-.000017 steel-.000013

2...The length of a brass bar increase from 4.001 into 4.0030 m. find the final temperature of the bar if the initial temperature was 0 Celsius.

coeff. of linear expansion brass-.000019