rpm to g?

Chong Wai Yin( Zhang Weixian)

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Apr 6, 2000, 3:00:00 AM4/6/00

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Hi, does anyone know how to convert rpm (rounds per minute) to g (gravity)?
eg. 14000rpm = ?g

--
Chong Wai Yin, Kelvin
Zhang Weixian
-- For Nature, heartless, witless Nature
Will neither know nor care.
And from my pillow, looking forth by light
Of moon or favouring stars, I could behold
The antechapel where the statue stood
Of Newton with his prism and silent face,
The marble index of a mind for ever
Voyaging through strange seas of Thought, alone. --

Per Holse Mygind

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Apr 6, 2000, 3:00:00 AM4/6/00

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Depends on rotordiameter, I can't remmeber the formula, but most
manuals will supply you with a table/graph

-- 
Sincerely


Per Holse Mygind


************************************************************************

Per Holse Mygind, Cand.scient

Department of Medical Microbiology and Immunology
The Bartholin Building, University of Aarhus, Denmark
phone : 89 42 17 47, fax   : 86 19 61 28

************************************************************************

J. Martinez-Irujo

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Apr 6, 2000, 3:00:00 AM4/6/00

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> Hi, does anyone know how to convert rpm (rounds per minute) to g (gravity)?
> eg. 14000rpm = ?g
>
> --
> Chong Wai Yin, Kelvin
> Zhang Weixian

Try: http://www.uniport.com/centrifuge/CentrifugeHelper.html

--
Juan J Martinez Irujo
Departamento de Bioquimica
Universidad de Navarra
Pamplona, Spain

lamb

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Apr 6, 2000, 3:00:00 AM4/6/00

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I have the formula at work somewhere. I'll look for it tomorrow.

Loes

"Chong Wai Yin( Zhang Weixian)" wrote:

> Hi, does anyone know how to convert rpm (rounds per minute) to g (gravity)?
> eg. 14000rpm = ?g
>
> --
> Chong Wai Yin, Kelvin
> Zhang Weixian

Nicolas Lemee

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Apr 6, 2000, 3:00:00 AM4/6/00

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http://opbs.okstate.edu/~melcher/CentHelp.html

--
Nicolas

pathos

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Apr 6, 2000, 3:00:00 AM4/6/00

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In article <38ECD063...@cable.A2000.nl>, lamb
<L.A.M....@cable.A2000.nl> wrote:

> I have the formula at work somewhere. I'll look for it tomorrow.
>
> Loes
>
> "Chong Wai Yin( Zhang Weixian)" wrote:
>
> > Hi, does anyone know how to convert rpm (rounds per minute) to g (gravity)?
> > eg. 14000rpm = ?g
> >

RCF = 1.12r (RPM/1000)exp2 RCF= root cetrifugal force
r =radius of rotor

I could be wrong but this is the formula a seem to recall

--
Peter Pediaditakis
University of Pittsburgh
Dept. of Pathology

Nicolas Lemee

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Apr 6, 2000, 3:00:00 AM4/6/00

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Here is also a nomograph
http://www.bd.com/labware/freestuf/pdf/p43.pdf
--
Nicolas

lamb wrote:

> I have the formula at work somewhere. I'll look for it tomorrow.
>
> Loes
>
> "Chong Wai Yin( Zhang Weixian)" wrote:
>
> > Hi, does anyone know how to convert rpm (rounds per minute) to g (gravity)?
> > eg. 14000rpm = ?g
> >

lamb

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Apr 6, 2000, 3:00:00 AM4/6/00

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Well, that's it, no need to bother tomorrow!
Nice link!

Loes

Frank Ward

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Apr 7, 2000, 3:00:00 AM4/7/00

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"Chong Wai Yin( Zhang Weixian)" wrote:

> Hi, does anyone know how to convert rpm (rounds per minute) to g (gravity)?
> eg. 14000rpm = ?g
>
> --
> Chong Wai Yin, Kelvin
> Zhang Weixian
> -- For Nature, heartless, witless Nature
> Will neither know nor care.
> And from my pillow, looking forth by light
> Of moon or favouring stars, I could behold
> The antechapel where the statue stood
> Of Newton with his prism and silent face,
> The marble index of a mind for ever
> Voyaging through strange seas of Thought, alone. --

Try this website for converting RPM to g or g to RPM:
http://www.beckman.com/Beckman/biorsrch/prodinfo/cntrifug/rotrcalc.asp
cheers

RSAM...@cs.com

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Apr 7, 2000, 3:00:00 AM4/7/00

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How can there be so much to do over such a simple problem?
Centrifugal acceleration equals the square of the angular velocity times the
radius.
Angular velocity is in radians per second and is gotten from rpm by
multiplying by 2PI
and dividing by 60. With the radius in cm the result is in cm/sec/sec.
Dividing by
g of 980 cm/sec/sec gives the equivalent g. This is a simple scientific
calculator
operation. Who needs to look up a formula?
Ralph L. Samson
---

Martin Maurer

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Apr 20, 2000, 3:00:00 AM4/20/00

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To convert rcf (relative centrifugation force = "g") to rpm (revolutions per
minute) or vice versa apply this formula:
rcf = 11,18 * r * (rpm/1000)^2
found in Hermle centrifugation catalogue.
Dr. med. Martin H. Maurer
Insitut für Physiologie und Pathophysiologie
der Universität Heidelberg
Im Neuenheimer Feld 326
69120 Heidelberg
Germany
Tel. +49-6221-54-5385
Fax. +49-6221-54-4561
---------------------------------------------------------

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