There is NO reaction between Cu and Ag.
60% coper + 20% nickel + 20% zinc
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There were no US silver dollrs minted in 1955, however, most US silver coins which were minted for circulation contained 90% silver and 10% coper.
Hans Coper died in 1981.
Coper is a natural resource.
quite simply because coper isnt magnetic.
"Can you please clarify your question? It seems like there may be a typo or missing information."
plate made of coper
Wood stone and coper
coper
steel, coper and ?
with special tools