### Homework Problem 8.3 Question

Posted:

**Thu Jan 31, 2019 5:28 pm**I do not understand how the inner diameter and the amount of depression helps us solve for the change in volume?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=129&t=41092

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Posted: **Thu Jan 31, 2019 5:28 pm**

I do not understand how the inner diameter and the amount of depression helps us solve for the change in volume?

Posted: **Thu Jan 31, 2019 5:35 pm**

The values given in the problem does not include the change in Volume. The pipe is a circular surface and to calculate its volume it would be pi * radius^2 * height. In this case the height would be how much the pipe decompressed. Thus to get change in volume you have to find radius which would be half of the diameter.