Final answer:
The increase in length of a rod due to a change in temperature can be calculated using its coefficient of linear expansion.
Step-by-step explanation:
The increase in length of a rod due to a change in temperature is determined by its coefficient of linear expansion. The coefficient of linear expansion represents how much the length of a material changes for every degree of temperature change. To calculate the increase in length of the rod, we multiply the initial length of the rod by its coefficient of linear expansion and the change in temperature.
For example, if the coefficient of linear expansion of the rod is 0.000012 per degree Celsius and the temperature of the rod increases by 70.0 degrees Celsius, the increase in length can be calculated as follows:
Change in length = initial length x coefficient of linear expansion x change in temperature
Change in length = initial length x 0.000012 x 70.0