[SOLVED] 10m Steel Wire Length/ +20 Degrees C 1. The problem statement, all variables and given/known data 10.00-m long steel wire supports a pendulum bob at its end. How many millimeters longer is the wire when the temperature increase by 20.0 C 2. Relevant equations (Delta)L = La(Delta)T or Change in Length = Length * linear expansion * change in temperature Linear Expansion for Steel a = 11x10^-6/C 3. The attempt at a solution The problem asks for: How many millimeters longer is the steel wire when the temp increases by 20 Celcius. Variables: L = 10M a = 11x10^-6/C (delta)T = (x+20) x = original temp equation: (delta)L = 10m * (11*10^-6/(x+20)) * (x+20) Attempt at Solving: 110m * 10^-5 (the x+20 cancel out?) And then I get confused as what to do. Any help is appreciated, tips are always welcome.