Date: Wed Dec 19 17:30:18 2007

Author: Machele Kindle

Subject: Re: two questions

Post:
I would imagine that the larva is pretty compact inside the bean, so the
bean can be seen to be a whole system. Thus, it's like us and we can
jump just fine using our muscles.

Chele

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?
>
>
>

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
For in the end, we will conserve only what we love.
We will love only what we understand.
We will understand only what we are taught. - Baba Dioum
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Machele Kindle
Graduate Student
Ira A. Fulton School of Engineering
Arizona State University
(336) 408-8382
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



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