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<p>[QUOTE="DEA, post: 3791852, member: 90140"]My memory isn't what it used to be and in forty years I've forgotten more stuff than I can remember [sorry], however, I vaguely recall an experiment I did for science class when I was ten or eleven or twelve. I had a chuck of copper connected to a voltmeter's roach clip immersed in water (plain tap water); probably the positive pole. I had a chunk of zinc (I bought at the "science and stuff" discount store on Layton Avenue) connected to the other voltmeter roach clip, immersed in the same water (a small fish tank or maybe some sort of glass bowl used normally in the kitchen). The voltmeter reported current between the nodes - the one with copper and one with zinc. There was perhaps a quarter to half foot separation between the two metals. The water in Milwaukee was pretty dense with chlorine (one could smell it) but the water was clear and healthy (as far as I know). So, all that to say, putting zinc together with copper seems a very foolish plan, or even ignorant. Using zinc seems even more silly when one considers the use of zinc in coinage in the past - by poor nations, or defeated and desperate governments. </p><p><br /></p><p>Goodness. What a rant. I'll stop now.</p><p><br /></p><p> Best,</p><p> David[/QUOTE]</p><p><br /></p>
[QUOTE="DEA, post: 3791852, member: 90140"]My memory isn't what it used to be and in forty years I've forgotten more stuff than I can remember [sorry], however, I vaguely recall an experiment I did for science class when I was ten or eleven or twelve. I had a chuck of copper connected to a voltmeter's roach clip immersed in water (plain tap water); probably the positive pole. I had a chunk of zinc (I bought at the "science and stuff" discount store on Layton Avenue) connected to the other voltmeter roach clip, immersed in the same water (a small fish tank or maybe some sort of glass bowl used normally in the kitchen). The voltmeter reported current between the nodes - the one with copper and one with zinc. There was perhaps a quarter to half foot separation between the two metals. The water in Milwaukee was pretty dense with chlorine (one could smell it) but the water was clear and healthy (as far as I know). So, all that to say, putting zinc together with copper seems a very foolish plan, or even ignorant. Using zinc seems even more silly when one considers the use of zinc in coinage in the past - by poor nations, or defeated and desperate governments. Goodness. What a rant. I'll stop now. Best, David[/QUOTE]
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