Jul 24, 2013 · To test a digital scale if you don't have a special calibration weight you can use coins: (Make sure to use new, shiny coins. Worn coins will weigh less)..A U.S. nickel (5-cent coin for non-Americans) weighs exactly 5.00 grams and a U.S. cent (since 1983) weighs exactly 2.50 grams..U.S. Cents 1981 and before weigh 3.11 grams. How do we know about these routes? Scientists study birds. They catch birds, place small bands with numbers on the birds' legs and let them fly away. Swallows and swifts do this. Cuckoos fly during the night and rest and feed during the day.
A 50 ml volumetric flask filled with aqueous solution