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 dime is worth 10 cents and is equal to 2 nickels or 10 pennies. A nickel is worth 5 cents and is equal to 5 pennies. Two nickels have the same value as 1 dime A penny is worth 1 cent.Five pennies have the same value as 1 nickel.Ten pennies have the same value as 1 dime. A nickel is worth 5 cents and is equal to 5 pennies. 2  Two nickels have the same value as 1 dime. 3  A penny is worth 1 cent. 4  Five pennies have the same value as 1 nickel. 5  Ten pennies have the same value as 1 dime.