A copper telephone wire has essentially no sag between poles 36.0 m apart on a winter day when the temperature is −20.0°C. How much longer is the wire on a summer day when the temperature is 34.0°C?

The extension is  

Explanation:

From the question we are told that  

     The length of the wire on a winter day is    

      The temperature on the winter day is  

      The temperature on a summer day is  

The the extension of the wire on a summer day is mathematically represented as

Where  

      is the  coefficient of linear expansion of copper with a values

substituting value  

the gas collects in coils that then becomes a liquid that then flows through the coils inside the refrigerator

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.