web as ftp mode, was Energy Sucker

[gastineau@badgerden.com (John E. Gastineau)]

Richard Langer wrote:

> Now we know that we can't use a Web Browser like Netscape to distribute
> documents.

Actually, it does work. I  take up the bandwidth of phys-l to show 
everyone how as this solves a problem that I and others have had. 
Keep  reading for the physics  content.

Often a university or commercial service will not allow anonymous 
ftp, so if you want a colleague to grab a file you have to give out 
your password. Bad, bad. But, if you have a web server, you can just 
place the file there and give out the location. The recipient uses 
the url with http, not ftp, like this:

http://www.badgerden.com/~gastineau/ecrossb2.ip

If you use this method you can distribute files using a browser and 
without distributing your  password. 

Now, the obligatory physics content: the above url points to an
Interactive Physics 2.5 file that simulates the motion of a charged
particle in cross electric and magnetic fields. There's a twist:
there are three non-interacting particles, one moving at the proper
speed so the magnetic and electric forces balance, another too fast,
and another too slow. All are initially moving in the x direction.
Here's a question to ask before you run it--will the fast-proper-slow 
x component order be maintained for all time? for all velocities? 
Check it out. 

I did  create this in IP3 with a SVGA screen size, but saved in IP2.5 
format. Smaller screens won't see everything. It should open in 
IP2.5, but I can't test that. 

JEG


--
John E. Gastineau
900 B Ridgeway Ave.
Morgantown, WV 26505
(304) 296-1966
http://www.badgerden.com/~gastineau
gastineau@badgerden.com   <==== NEW as of 10/1/96