Re: science teacher needs help

If you are the science teacher sending students to my college, I'd suggest
that you take an English I class that teaches you how to spell "matter",
"aluminum", "opened", and "sufficient".

Also punctuation, but I guess I can't expect that from a high school
teacher.

Jim




"semidemiurge" <rick.fetters@xxxxxxxxx> wrote in message
news:1129781731.823853.227040@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>I need a simple solution for a classroom science project. I am a
> science teacher and I am constructing apparatus to demonstrate that a
> projectile drops at the same rate as an object falling in the vertical
> axis alone.
> I have the target released by energizing a solenoid, this is suppose to
> happen when the projectile exits the muzzle of a blowgun. My problem
> is how to energize the solenoid by the passage of the dart out the
> muzzle. One thought was using a NO microswitch but it causes a
> deflection in the path of the dart no mater what I do. I was thinking
> about using a small piece of alluminum foil that would be severed
> (breaking contact) but I would need some technique/circuit that would
> start the current flow to the solenoid when the foil circuit was
> openned. I don't have a suffecient background in electronics to solve
> this on my own, any suggestions? thanks rick
>


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