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.
A 1942 copper penny is worth between $0.15 and $3.00. If you have a 1943 copper penny it is worth a lot more. In 1943 because of the war and the need for copper pennies in tha â¦ t year were made from steel.Steel pennies from 1943 are worth around $0.30 and $2.50.n any case 1942 cents are not rare. In worn condition they're worth less than a dime. With only moderate wear, a 1942 cent with no mint mark under the date is worth about a quarter. With a D, 30 cents; with an S, 70 cents.