Formatting MPa to the power of (1/3) in Mathcad 15

Forum|Forum|6 years ago
April 10, 2020
2 replies
2432 views

Hi!

I have created a workset that requires a vairable to be raised to the power of 1/3 (one third). The variable already has the unit MPa, but the unit of the result is a bit messy as seen below. Can i change that back to MPa by any chance? Screenshot below.

I am using Mathcad 15.0 (M050 [MC15_M050_20171129])

Thanks in advance.

Civil_Engineering

Best answer by ChrisKaswer

You cannot apply units in a relation that does not provide properly balanced units as a result - just like with your situation. If your value for "q" must end-up as units of MPa, because "a" is in this unit, then you can do the following:

You'll need to make sure you always define "a" in MPa as well.

C

ChrisKaswer

Answer

16-Pearl

You cannot apply units in a relation that does not provide properly balanced units as a result - just like with your situation. If your value for "q" must end-up as units of MPa, because "a" is in this unit, then you can do the following:

You'll need to make sure you always define "a" in MPa as well.

A

Anders

Author

1-Visitor

Allright, thanks a lot!

It is not excactly pretty, but it does the job.

C

ChrisKaswer

16-Pearl

Agreed, but that's a fundamental issue with using software that deals with units as well as Mathcad - you can't end-up with a "MPa" raised to the 1/3 power, and that's what we're really asking Mathcad to do in your original equation. If there was an additional part of your relation that raised the entire result to the 3rd power, you'd be all set. I've used this approach hundreds of times in the past as it's the only way to deal with these kinds of relationships.

Good Luck