For years, critics of the penny have pointed out that putting a copper-coated zinc disc in your pocket costs the government more than a cent — almost 4 cents today. Will Trump's order make the ...

Trump ordered the Treasury Department to stop making pennies with a Feb. 10 sentence on his social media account that followed years of conservatives pointing out that putting a copper-coated zinc ...

A copper penny is heated and suspended above the surface of acetone in a beaker. The copper demonstrates heterogenous catalysis in the combustion of acetone to carbon dioxide and water. This exotherm ...