A145.0 km long electric power line made out of copper is installed during the spring months at an average temperature of 13.7 °c. what is the change in the length of the power line on a hot summer day, when the temperature is 42.0 °c? the coefficient of linear expansion for copper is 1.62×10-5 1/c°. use positive sign for an increase in length and negative for a decrease.

66.4767 m

Explanation:

= Original length of power line = 145 km

= Coefficient of linear expansion =

Initial temperature = 13.7°C

Final temperature = 42°C

Change in length of a material is given by

The change in length will be 66.4767 m

conduction, convection, radiation

this is an example of "committed" time.

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