im doing a project in school ASAP
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It appears that Justin has not had the benefit of attending school...
Search online and I'm sure you can find many different designs. The basic physics is that, when you insert some type of metal into a fruit (typically an acidic environment), if it is the "right" metal, the acid causes corrosion. Corrosion is an electro-chemical process so, if you connect one wire to the metal that is corroding (like an iron nail for instance) and connect the other end of the wire to a different metal (say an aluminum nail or a piece of copper wire in that fruit), it will create a voltage difference and set up an electic current.
You need to search to find some candidates for the "right" combination of metals (or you can just experiment on your own). You also need a way to "see" that the battery is working, i.e., that there is current flowing. You might do this with a light bulb (like a flashlight bulb) or with a volt meter.
Good luck
Search online and I'm sure you can find many different designs. The basic physics is that, when you insert some type of metal into a fruit (typically an acidic environment), if it is the "right" metal, the acid causes corrosion. Corrosion is an electro-chemical process so, if you connect one wire to the metal that is corroding (like an iron nail for instance) and connect the other end of the wire to a different metal (say an aluminum nail or a piece of copper wire in that fruit), it will create a voltage difference and set up an electic current.
You need to search to find some candidates for the "right" combination of metals (or you can just experiment on your own). You also need a way to "see" that the battery is working, i.e., that there is current flowing. You might do this with a light bulb (like a flashlight bulb) or with a volt meter.
Good luck
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How the f*ck are you planning to do that with fruit your a spastic and your school is totally f*cked in tha head bro! No offense dude