A copper rod is 0.450 m long. Heat is added to the rod until it expands by 0.00130 m. How much did the temperature change? (Unit=C)

170 ⁰C

Explanation:

α = ΔL / (LO*ΔT)

HERE α is coefficient of linear expansion which is constant for different materials, its value for copper is 17*10^-6 (⁰C) ^-1

ΔL is change in length, Lo is original length, ΔT is change in temperature

re arranging the equation for ΔT we get

ΔT = ΔL / (LO*α)

= (0.00130) / (0.450 * 17*10^-6)

= 169.9⁰C

= 170 ⁰C