Calculating Length, Diameter and Volume Change of a Laser Rod

AI Thread Summary
The discussion focuses on calculating the changes in length, diameter, and volume of a glass laser rod due to a temperature increase of 78.5°C. The length of the rod increases by 0.0132 cm and the diameter by 0.0009396 cm. The user is uncertain about how to calculate the increase in volume, prompting suggestions to refer to volume expansion concepts in textbooks or online resources. Initial volume calculations are straightforward, and guidance is provided to look up relevant formulas. Understanding thermal expansion principles is essential for completing the volume change calculation.
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Homework Statement


The active element of a certain laser is an ordinary glass rod 18.7 cm long and 1.33 cm in diameter. If the temperature of the rod increases by 78.5oC, calculate its increase in length. Calculate its increase in diameter. Calculate its increase in volume.


Homework Equations



change in L=Li*alfa*change in T


The Attempt at a Solution


Length increased by 0.0132 cm
Diameter increased by 9.396E-4cm
I don't know how to get the increase in volume. Could someone please help? Thanks!
 
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