Curve fitting

With your mouse, drag data points and their error bars, and watch the best-fit polynomial curve update instantly. You choose the type of fit: linear, quadratic, cubic, or quartic. The reduced chi-square statistic shows you when the fit is good. Or you can try to find the best fit by manually adjusting fit parameters.

Equation Grapher

Learn about graphing polynomials. The shape of the curve changes as the constants are adjusted. View the curves for the individual terms (e.g. y=bx ) to see how they add to generate the polynomial curve.

Vector addition

Learn how to add vectors. Drag vectors onto a graph, change their length and angle, and sum them together. The magnitude, angle, and components of each vector can be displayed in several formats.

Projectile motion

Blast a Buick out of a cannon! Learn about projectile motion by firing various objects. Set the angle, initial speed, and mass. Add air resistance. Make a game out of this simulation by trying to hit a target.

The web site, where I have found the “flash” math files above is:

http://phet.colorado.edu/en/simulations/category/new

GeoGebra

Click on the picture below to try the Java version of GeoGebra.

Math Scripts

Let the Scripts do your calculations. Click below

Unit converter

Try the unit converter. It will convert: Acceleration, area, Torque, electricity, energy, force/length, light, mass, mass flow, density/mass capacity, power, pressure and stress, temperature, time, velocity/ speed, viscosity, volume/capacity and volume flow. Click at the picture below.

Graph!

The curves below are made in Graph. The curves on the left are parameters of: distant, velocity and acceleration.

The right curve is the super ellipse invented by Piet Hein

Graph is a freeware program and you can download at: www.padovan.dk

Download both Graph files here

Web sites with math.

http://www.frividen.dk/

http://www.khanacademy.org/

http://www-math.mit.edu/~gs/

http://patrickjmt.com/

http://www.youtube.com/user/Vsauce

http://ing.dk/

https://www.restudy.dk/