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ValeryOchkov24-Ruby IV
24-Ruby IV
October 22, 2012
Question

Additional Dimensions for Mathcad Prime 3.0

  • October 22, 2012
  • 6 replies
  • 4250 views

I would like to see in Mathcad Prime 3.0 not only Additional Units - see http://communities.ptc.com/message/190702

but also Additional Dimensions (Physical quantities😞

  • concentration

mg/L, mol/L, mol/kg, p.p.m., p.p.b. etc

  • specific heat capacity and entropy

kJ/(kg K), Btu/(lb °R) etc

  • enthalpy

kJ/kg, Btu/lb etc

  • quantity of information

bit, bite, kB, MB, GB etc

etc

What would you like have more?

6 replies

HarveyHensley12-Amethyst
12-Amethyst
October 23, 2012

Mathcad Help file refers to dimensions as base units, so that is what I assume you mean by dimensions.

The current (Mathcad 15) base units are as follows: current, length, luminous intensity, mass, money, substance, temperature, and time.

All of your suggestions except bit, byte, etc can be expressed in the base units. I see no need to start having base units that are in fact combinations of true base units.

ValeryOchkov24-Ruby IVAuthor
24-Ruby IV
October 23, 2012

Now I must use in my steam-gas thermal cycle calculation two Physical quantities - mass of water/steam and mass of gas:

|-User units-------

kJ/kg:=1000J/kg kJ/kg:=1000J/cd

|-User units-------

See for example Fig. 2.19 here http://twt.mpei.ac.ru/ochkov/T-2012/Chapter2-Units.pdf

I have a dream to have 3-7 user dimensions (Physical quantities) in Mathcad - mass of water/steam and mass of gas for example.

ValeryOchkov24-Ruby IVAuthor
24-Ruby IV
October 23, 2012

One more simple example - Function of the cylinder volume.

We have TWO Physical quantities(dimensions) - length-diameter and length-high (of the cylinder).

No error message but must be an error:

dh.png

An Error message:

http://twt.mpei.ac.ru/ochkov/Mathcad_14/Chapter2rus/2-16-cylinder-m-d-m-h.PNG

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