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Offline Brian729  
#1 Posted : 10 June 2020 02:59:06(UTC)
Brian729

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I have the following variables:
d (density) in gm per cm*cm*cm,
s (area) in cm*cm,
n (atoms per ml) = density*Avagadros number* Moles per gram

Units of D are gm/(cm*cm*cm)
Units of s are cm*cm
Units of n are calculated by SMATH to be gm/(m^3 kg) (ok conceptually, would like to get rid of grams per kilogram)
How do I get that to 1/(cm^3)? I've tried lots of unit operations and I'm stymied.

Similarly, I calculate t=1/(n*s), results should be in cm, but SMATH calculates (kg * cm / gm). Is there a way to get this normalized to just cm?

Thank you!

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Offline Jean Giraud  
#2 Posted : 10 June 2020 03:34:12(UTC)
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Construct the project in the SI unit system.
BTW, density is what = nothing/anything.
"weight density" has meaning, in SI kg/m³
Offline mkraska  
#3 Posted : 10 June 2020 10:31:59(UTC)
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Originally Posted by: Brian729 Go to Quoted Post
I have the following variables:
d (density) in gm per cm*cm*cm,
s (area) in cm*cm,
n (atoms per ml) = density*Avagadros number* Moles per gram

Units of D are gm/(cm*cm*cm)
Units of s are cm*cm
Units of n are calculated by SMATH to be gm/(m^3 kg) (ok conceptually, would like to get rid of grams per kilogram)
How do I get that to 1/(cm^3)? I've tried lots of unit operations and I'm stymied.

Similarly, I calculate t=1/(n*s), results should be in cm, but SMATH calculates (kg * cm / gm). Is there a way to get this normalized to just cm?

Thank you!



Sure that gm is correct for gram? Used to be in very old SMath versions. Now it is g. It should be obvious from the dynamic assistant whether a given unit is available or not.
Martin Kraska

Pre-configured portable distribution of SMath Studio: https://smath.com/wiki/SMath_with_Plugins.ashx
Offline Razonar  
#4 Posted : 10 June 2020 22:34:37(UTC)
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Originally Posted by: mkraska Go to Quoted Post
...
Sure that gm is correct for gram? Used to be in very old SMath versions. Now it is g. It should be obvious from the dynamic assistant whether a given unit is available or not.


Hi. This is a picture about what Martin says:

Clipboard01.jpg

Best regards.
Alvaro.
Offline Jean Giraud  
#5 Posted : 11 June 2020 03:52:03(UTC)
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The Engineering form of Avogadro P*V=Z*n*R*T
Where 'Z' compressibility factor from source.
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