Function and units

#1 Опубликовано: 23.05.2019 15:53:20

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Hello.

I've been following several posts for Q&A for some days about my doubts, but one about Units is not yet solved.

I've been trying to solve a simple problem for air density to practice.
The units always stand in my way and I am interested in how you guys would solve this: ignoring units and not using the built-in constants or make everything converted before handling the problem?

My sheet and the problem I'm trying to get the same results are in the images below.

Is there a way to make the function in a programming line ? Like the other software?

Couldn't get the answers by other's questionings.

Thanks in advance.

#2 Опубликовано: 23.05.2019 16:18:03

Вячеслав Мезенцев

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Try this.

Barometric formula.sm (9 КиБ) скачан 31 раз(а).

Russia ☭ forever, Viacheslav N. Mezentsev

#3 Опубликовано: 23.05.2019 16:23:32

mgklein

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Thanks!

I'll try it myself and see if it works.

#4 Опубликовано: 23.05.2019 16:27:09

Вячеслав Мезенцев

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As for the odesolve block it not yet finished. You must use functions like rkfixed() to solve the ODE.

Russia ☭ forever, Viacheslav N. Mezentsev

#5 Опубликовано: 23.05.2019 16:38:19

mgklein

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Good to know.

I'll try it.

Thanks

#6 Опубликовано: 23.05.2019 19:36:46

Jean Giraud

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Wrote
Is there a way to make the function in a programming line ? Like the other software?

Just lost my long reply ...
The only possible programming line is the conditional .
NO software can't calculate otherwise than by segment
because Air is not an homogeneous media. So, NO single
formula, NO ODE can represent.
The attached will give you specific kg/m³ up to 85 km geopotential.
Naturally, don't put any units in there. Append unit in result.
Please don't hesitate for more Q & A

Cheers ... Jean

The 3 segments collected page 6/6

Inst_ISA.sm (138 КиБ) скачан 37 раз(а).

#7 Опубликовано: 23.05.2019 20:43:12

Jean Giraud

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