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Need major help on a science fair project!

Hi,

I have a problem, see I have to do a science fair project and I mean I have to. My topic is What kind of juice cleans pennies better? I already know that it is the acid in the juice. But every place I go to find out why they don't know why or I just can't find it. So why does acid in juices clean pennies at all? How does it work, explain! I really need help!

Barry Barker
- Jacksonville, Florida, USA

Hi, Barry. I just tried to answer the same question in letter 11200. Please check there.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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