The US mint lists the mass of a clean, current (2012) penny as 2.5 grams.
I'll spare you all the unit conversions and just blurt out the answer.
(Just because I have to do all that work, why should you suffer ? !)
At 2.5 grams per penny, you'd need 182 of them to weigh one pound.
One modern cent weighs 2.5 grams and contains 2.5% copper, which is 0.0625 grams or about 0.000138 lbs of copper per penny. To get one full pound of copper, it would take 7,246 pennies.
5 pennies
It takes a million pennies to make a million pennies. It takes one hundred million pennies to make a million dollars.
100 pennies = 1 pound.
5,000,000
In 1 pound of pre-1982 copper pennies, there are approx 448 grams of weight. Knowing that a copper pre-82 penny weighs 3.11 grams, simply divide the approx 448 grams in 1 pound by the individual penny weight of 3.11grams. The answer to"how many copper pennies does it take to make a pound" is this.It would take 144.05144 copper pennies to weight 1 pound........give or take a couple.One copper cent weighs 3.11 grams, and one pound is 453.59 grams. Do the math, and it comes out to 146 copper cents per pound.
One modern cent weighs 2.5 grams and contains 2.5% copper, which is 0.0625 grams or about 0.000138 lbs of copper per penny. To get one full pound of copper, it would take 7,246 pennies.
Prior to 1982, U.S. pennies were made of 95% copper. Each penny weighs 3.11 grams, so 100 pennies weigh about 311 grams. To obtain $100 worth of copper, you would need approximately 1,750 pre-1982 pennies, as the copper value is based on the current market price of copper.
5 pennies
It takes a million pennies to make a million pennies. It takes one hundred million pennies to make a million dollars.
100 pennies = 1 pound.
5,000,000
Since 100 pennies make a dollar you take 1225000 pennies make 12250. You just divide by 100.
pennies are made of copper and are not living and cannot grow.
100 000.
100 million
Oh, dude, a copper bar is like a fancy way of saying a solid block of copper, right? So, technically, you could melt down a copper bar and make a bunch of pennies out of it, but like, the exact number of pennies would depend on the weight and size of the bar and the size of the pennies. But hey, who's got time for all that math, am I right?