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.
Quick Answer. United States pennies minted after 1982 weigh 2.5 grams, or 0.088 ounces. These pennies are 2.5 percent copper and 97.5 percent zinc. Before 1982, pennies weighed 3.11 grams, or 0.110 ounces. They were 95 percent copper and 5 percent zinc, which is a form of bronze. Continue Reading.