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ptc-60266711-Visitor
1-Visitor
May 13, 2014 10:18 AM UTC
Question

Celsius grade error

Mathcad Prime Express 3.0:

img000017.png

This is ingenious!!!

Michal Glebowski

5 replies

KenFarley
KenFarley21-Topaz II
21-Topaz II
May 13, 2014 10:38 AM UTC

Looks like a conversion to Kelvin is done prior to the calculation. Or a conversion to some other absolute unit of measure for temperature. All in all, though, kind of disturbing.

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ptc-60266711-VisitorAuthor
1-Visitor
May 13, 2014 10:57 AM UTC

Even if it is converted to Kelvins (it can be as there is no similar problem with Kelvins) I would expect rather value 2 with some noise, not 1... This conversion must be very rough.

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KenFarley
KenFarley21-Topaz II
21-Topaz II
May 14, 2014 1:47 PM UTC

Why would you expect 2?

275 / 274 = 1.0036...

It might be helpful to know why you're calculating the ratio of two temperatures. Is the ratio being looked for actually the ratio of two temperature changes, i.e. (T2 - T1) / (T4 - T3)? If so, you might have to explicitly make the relation ignore units in order to obtain the expected results.

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ValeryOchkov24-Ruby IV
24-Ruby IV
May 30, 2014 3:17 AM UTC

Better

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