Ira Posted January 28, 2004 Report Share Posted January 28, 2004 If you're doing the experiment and want it published or for a doctoral thesis or something like that...Yeah, 30 or more is better. But, like interfecus says, for a science fare experiment or just for curiosity 5 is more than sufficient unless you wanna go for extra credit... Quote Link to comment Share on other sites More sharing options...
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