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Old 11-01-2006, 10:58 AM
starlight5 starlight5 is offline
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Default Help Please!!!!!!!!!!!!!!!!!!!!

hi i need help on my science fair project

i cant pick which project to do can u pleaseee help me
these are the three topics i choose
Tell me if there is any way i can make it better by expanding it any way

1.) which combination of metals( zinc and nickel, nickel and copper or copper and lead) has the highest voltage? ( is this too easy or is there anyway i can extend to make it better)

2.) which battery ( potato, lemon or banana) has the highest voltage?

3.) i was going to do something about invisible ink but i dont have any ideas please tell me if u do

THanks
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