Definition of 'optimum'. Word Frequency. optimum (ÉptÉªmÉm ) or optimal. adjective. The optimum or optimal level or state of something is the best level or state that it could achieve. [formal] Aim to do some physical activity three times a week for optimum health. ...regions in which optimal conditions for farming can be created.
Quick Answer. Pennies produced by the U.S. Mint since 1982 are an alloy of 2.5 percent copper and 97.5 percent zinc. The penny weighs 2.5 grams, so each penny contains 0.0625 grams of copper.
The 1943 pennies are made of steel not silver. There are a handful of copper 1943 pennies floating around but those are extremely rare and valuable. Even in very high grade, tâ¦he 1943 steel penny isn't worth more then $50-100. Average circulated grade your looking at a few dollars at the most.