Zinc-core pennies have been made since 1982, and are lighter than all-copper pennies made prior to this (2.5 grams vs 3.1 grams). In addition, pennies of the same "generation" can exhibit greater amounts of dirt on them (increasing weight - gross but true), and different amounts of wear to the metal (decreasing weight).
How much does a 2 liter of pennies weigh?
9000 pennies weigh
Modern zinc (1982-present) pennies weigh 2.5 grams each, and copper pennies (pre-1982) weigh 3.11 grams each. 50 new ones weigh 125 grams and 50 old ones weigh 155.5 grams. A mix of the two weighs somewhere in the middle.50 US pennies would weigh about .338 pounds.
One penny weighs 2.5 grams, so 3,500 pennies weigh 8,750 grams.
Of 1131 pennies, x weigh 3.09 g and y weigh 2.51 g. In total, the 1131 pennies weigh 3001.8 g. 3.09x + 2.51y 1131 = 3001.8 I have no idea what to do after that, or if it's even right. I was thinking maybe dividing, but the number was so small it had to be wrong. Tell me, what grade is this for?
1 billion pennies would weigh 5,511,556.55 pounds. The weight of a penny is 2.5 grams
=It takes EXACTLY 100000000000080200000000008042 pennies!!!!!!!=
Depends on whose pennies (which country) and the force of gravity which is not uniform.
Depends on their dates. Pennies before 1982 weigh 3.11 grams. Pennies from 1983 to now weigh 2.5 grams. Pennies dated 1982 could weigh either amount. An ounce equals 28.35 grams. Separate your coins into piles by date and get out your calculator.
3.11 grams for pennies made from 1959 to 1982
7,142 pennies weighs about 39.4 (39.3635369)pounds.
It depends on the coins' dates. Pennies minted in 1983 and later weigh 2.5 gm. each Pennies minted in 1981 and earlier weigh 3.11 gm. each Pennies minted in 1982 could weigh either amount because the metal composition was changed in the middle of the year.