Particles / Forces

[YT2095]

I think some of you may enjoy this: http://www.seb.cc/particles/

[Royston]

Neat...drag the balls for maximum fun

 

I recommend trying zero friction, with maximum repulsion and attraction.

[swansont]

Notice the symmetry you get when you bump up the friction and let things settle in.

[Mr Skeptic]

So is the attraction a large inverse square force, and the repulsion a smaller inverse cube force, or how does it switch from attraction to repulsion?

[Martin]

So is the attraction a large inverse square force, and the repulsion a smaller inverse cube force, or how does it switch from attraction to repulsion?

 

that seems like a good guess---maybe someone can figure out by experimenting with them---anyway it'd be

something that would make the repulsion have relatively short range

BTW I see when repulsion is turned all the way off they pass right through each other and then with a little bit of repulsion turned on they begin to collide and bounce off each other

 

interesting, I will see if I can find one or two other physics simulations that are fun like this and add to the thread

 

Yeah.

http://www.its.caltech.edu/~phys1/java/phys1/MovingCharge/MovingCharge.html

 

you can drive the charge around at random and also see how antennas send out EM waves by making it accelerate regularly back and forth or just go around in a circle.

 

It would be interesting to see some other favorites if anyone has some that are intriguing to play with.

[swansont]

Yeah.

http://www.its.caltech.edu/~phys1/java/phys1/MovingCharge/MovingCharge.html

 

you can drive the charge around at random and also see how antennas send out EM waves by making it accelerate regularly back and forth or just go around in a circle.

 

Yeah, you can see the dipole pattern when you do that. Also, in the sine wave you can see there's a difference between the near-field and far-field field.

 

Laser cooling applets

http://www.colorado.edu/physics/2000/applets/lcooling1.html'>http://www.colorado.edu/physics/2000/applets/lcooling1.html

 

optical molasses (2-D laser cooling)

http://www.colorado.edu/physics/2000/applets/lc2d.html'>http://www.colorado.edu/physics/2000/applets/lc2d.html

 

BEC/evaporative cooling

http://www.colorado.edu/physics/2000/applets/bec.html'>http://www.colorado.edu/physics/2000/applets/bec.html

 

The index to a whole bunch of them

http://www.colorado.edu/physics/2000/applets/

[thedarkshade]

Cool YT, absolutely practical.

 

When I made repulsion and attraction maximum and made friction zero, The stuff was going just together and break all the time, and it came to my mind the stuff about universe coming together and breaking apart again. Neat!

 

YT ,Martin, swansont, thanks for the wonderful links:D:D!