Science 2008
Centrifuge RPM and RCF Calculator
This calculator allows you to inter-convert between RPM and RCF for any centrifuge with a known rotor size. There is a limited list of rotors below for manual rotor selection.
You are currently solving for rotational speed (RPM)
Read more...First published on 21st September 2008 and last modified on 25th June 2011.
Standard Deviations
The correct manipulation of standard deviations is an often overlooked skill. When working with data sets it is cruicial that the correct manipluations are applied for the results to be valid.
This page demonstrates several methods for combining standard deviations correctly with some worked examples.
Addition and subtraction of values with standard deviations
Consider this problem where each value (a, b or c) has an associated standard deviation or error (Da, Db or Dc respectively). We are trying to calculate the correct value for z ± Dz:
Read more...First published on 21st September 2008 and last modified on 16th March 2011.
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