Re: [Phys-l] two questions

[Dennis Erickson <derickson.21stcentury@rcn.com>]

I once tried a stream of CCl4 & and it did not attract to a charged rod.




******************************************************
Dennis Erickson
WA9FBC

Latin School & Chicago Sidewalk Astronomy Club

http://www.sidewalk-astronomy club.com/chicago/

http://www.darksky.org

Keep your eye on the Sky!
*******************************************************

On Dec 19, 2007, at 9:46 AM, Anthony Lapinski wrote:

> A few of my science colleagues were discussing some physics/chemistry
> concepts.
>
> 1. Does anyone know how a Mexican jumping bean works? I believe  
> there is
> an insect larva inside that can jump. How, then, does the bean rise  
> upward
> since the forces are internal (and thus momentum is conserved)?
>
> 2) Water is a polar molecule, and a charged balloon will easily bend a
> stream of water. Hexane is not a polar molecule, and chemistry demo  
> books
> say the stream should NOT bend. But if you put hexane in a buret, a
> charged balloon DOES bend the stream. A charged balloon should  
> attract any
> neutral object, right? Something seems wrong here...
>
> Can anyone assist me with these questions?
>
> _______________________________________________
> Forum for Physics Educators
> Phys-l@carnot.physics.buffalo.edu
> https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l