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B
BB_1410064610-Marble
10-Marble
May 23, 2026
Question

Units Error

  • May 23, 2026
  • 2 replies
  • 22 views

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

B
BB_1410064610-MarbleAuthor
10-Marble
May 23, 2026

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

W
Werner_E25-Diamond I
25-Diamond I
May 24, 2026

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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