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Free-Fall Equations

The equation of two-body non-rotating radial free-fall in Newtonian theory is formally identical to the one-body radial free-fall solution in Einstein's theory. This site derives the cycloidal form ...

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http://mathpages.com/rr/s4-03/4-03.htm

Mean Free Path

The mean free path or average distance between collisions for a gas molecule may be estimated from kinetic theory.

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http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/menfre.html#c1

Free Electron Laser

Many features of the dynamics of free electron lasers can be understood using a simple pendulum model. This site uses JAVA applets to demonstrate this.

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http://webphysics.davidson.edu/applets/FELPart/FelOde.html

Helmholtz Free Energy

Definitions of Helmholtz free energy and Gibbs free energy.

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http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/helmholtz.html#c1

Gibbs Free Energy

Single page describing Gibbs Free Energy, includes links to related topics.

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http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/helmholtz.html#c1

Free Body Diagram

A free-body diagram is a sketch of an object of interest with all the surrounding objects stripped away and all of the forces acting on the body shown.

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http://hyperphysics.phy-astr.gsu.edu/hbase/freeb.html#fb

Permeability

In the equations describing electric and magnetic fields and their propagation, three constants are normally used. One is the speed of light c, and the other two are the electric permittivity of free ...

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http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elefie.html#c3

Mathematics Experiences Through Image Processing

Tutorial on digital image processing, together with free educational software to show the use of mathematics. The educational software is free, requiring only that you fill out a form before ...

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http://www.cs.washington.edu/research/metip/