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BB_1410064610-Marble
10-Marble
May 23, 2026 7:42 PM UTC
Question

Units Error

I’m using MathCAD Prime 9.0.0.0 and I’m running into a units error…

All of the R units should be K/W, but I’m getting crazy units especially on Rmid. I attached my program as well as lecture notes that show how to do this. Look on page 44-45.

 

Thanks,

    Brent

2 replies

BB_1410064610-MarbleAuthor
10-Marble
May 23, 2026 7:45 PM UTC

My MathCAD file didn’t attach. I guess I had to ZIP it first.

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Werner_E
Werner_E25-Diamond I
25-Diamond I
May 24, 2026 1:43 AM UTC

Are you sure that L1, L2 and L3 should be dimensionless?

Maybe they are expected to be lengths?

Like

If you do so, you get the desired unit K/W for all resistance values except Rmid.

Could it be that you perhaps forgot to use the reciprocal when calculating Rmid?

 

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