mike stainbrook wrote:
> why the focus on burning something to get energy? I saw on a PBS show where
> "Bill Nye" used an ultrasound device to expand water into a vapor-water
> drop
> vanished with a pop-no heat,nothing burned.....self powered vanagon??
> hmmmmmm.  Mike
>

trouble there is you've got to supply the ultrasonic device with power
so something has to produce that energy.

you've got to either carry batteries or run a generator to do that.

--Wil