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.
Here is a cool list that details the top 25 most valuable pennies ever minted in the United States of America (updated: 2017). These coin values / worth's are not based off common errors like double dies, but rather coins that were issued into circulation as is. Check out the list below, some of these old coins are worth a ton of money. 1.) 1944 Steel Wheat Penny - Worth $110,334. 2.) 1943 Copper Wheat Penny - Worth $85,782.