pimple copper

pimple copper

noun Metallurgy.
a form of copper matte about 80 percent pure, somewhat less refined than blister copper.
Also called pimple metal.


Origin:
1865–70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Pimple copper is always a great word to know.
So is conservation of momentum. Does it mean:
law saying if there is no external force acting on a system the total momentum remains constant
says when a net force acting on an object will cause acceleration of that object
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