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Electromagnetic coil gun help with power(electric) source ? Answered

How could I build a small coil gun with magnetic wire. I know how to make it just what could I use as a small but powerful powerful power source would a 9 volt battery work. 
Many other ideas?

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user
steveastrouk (author)2012-05-24

A 9V battery would certainly not work.

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user

Why exactly what would I need to add to make it work

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