Two 0.327 cm metal rods, one made of copper and one made of aluminum, are placed end to end, touching each other. One end is fixed, so that it cannot move. The rods are heated from 0.0 degrees Celsius to 154 degrees Celsius. The coefficient of linear expansion for copper is 16e-6 K^-1 and for aluminum is 22.5e-6 K^-1. How far does the other end of the system of rods move? Answer is in millimeters.
Here's what I did:
I used the equation for thermal expansion: Change in L = (coef. of thermal expansion)(initial L)(change in T)
(3.27mm * 154K)(16e-6 K^-1 + 22.5e-6 K^-1) = .0194mm
I put the answer in and it is incorrect. What am I doing wrong?
Here's what I did:
I used the equation for thermal expansion: Change in L = (coef. of thermal expansion)(initial L)(change in T)
(3.27mm * 154K)(16e-6 K^-1 + 22.5e-6 K^-1) = .0194mm
I put the answer in and it is incorrect. What am I doing wrong?