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I am trying to do a simple calculation using a coefficient of thermal expansion. But the result is not as expected. The units of thermal expansion coefficient are in/in/deg F.
I attached a sample spreadsheet in Mathcad 15. The answer should be 0.936in but I cant seem to get that. What am I doing wrong.
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David,
for the temperature change, delta T, you need to use the unit "delt degree F", as you did for alpha: degree F by it iself relates to absolute 0 in Kelevin or 256K
Thanks that worked.
Wayne Reid wrote:
David,
for the temperature change, delta T, you need to use the unit "delt degree F", as you did for alpha: degree F by it iself relates to absolute 0 in Kelevin or 256K
Sorry, but "delt degree F" is one stupid units (in Mathcad). We must use not "delt degree F" but R (rankine) or K (kelvin). Same with "delt degree C".
Valery,
Thanks, but the guy is just dealing with thermal expansion, and the unit works a intended. I have no doubt you are correct, but in the structural industry, in the US, alpha is normally in C or F and we generally only need the expected maximum change in temperature; Strictly correct or not, "delta degree F" for this application is fine.
Anyway, your fast.
Wayne
Wayne Reid wrote:
Valery,
Thanks, but the guy is just dealing with thermal expansion, and the unit works a intended. I have no doubt you are correct, but in the structural industry, in the US, alpha is normally in C or F and we generally only need the expected maximum change in temperature; Strictly correct or not, "delta degree F" for this application is fine.
Anyway, your fast.
Wayne
Thanks Wayne, I know it!
>but in the structural industry, in the US, alpha is normally in C or F
See above the Mathcad-sheet with an error