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Q: How can you tell if a coin is 100 percent copper?
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Is the lead 100 percent lead?

Uh HUH and copper is 100 % copper


What percent of copper is a 1O THHN Electrical Wire?

I would need more detailon your question but what i can tell you is 100' of #10 THHN eire is 8320grams with insulation and 7110 grams as bear copper wire. Now what i am trying to figure out is if that copper wire is 100% copper or not?


Who mints 100 percent copper pennies?

Nobody mints 100% copper pennies. These days, copper is far too expensive to be minting low denomination coins such as a Penny, and many countries that still produce their lowest single unit of currency coins, do so from steel. Even in the old days copper was alloyed with other metals to produce "copper" coins. The closest the Royal Mint ever came to producing a 100% copper coin was in 1944 and 1945 where the copper content got up to 97%. Usually it was 95% copper.


Is a is quarter made of copper?

Mostly. The core is 100% copper and the outer cladding is 75% copper + 25% nickel. Taken together that makes the coin about 83% copper overall.


Full load copper loss of a 100 KVA transformer is 800W Its copper loss at 75 percent load will be?

100 is to 800 as 75 is to X. Cross multiply, 100 x X and 800 x 75, 100X = 60000. To get rid of the 100 divide it into both sides of the equation. X = 600. If the copper loss is linear, at 75 percent the copper loss will be 600 watts.


Will copper coin melt on 100 degree if put on gas fire for 12 hrs?

No, the boiling point of water is 100 degrees Celsius. The melting point of copper is 1,083 degrees Celsius.


How do you make a percent for this problem miki tosses a coin 50 times and the coin shows head 28 times What is the percent?

28 times out of 50 as a percent is achieved thus (28/50)*100 = 56% (The coin would appear to be biased by the way).


How much of an alloy that is 20 percent copper should be mixed with 100 ounces of an allo that is 60 percent copper in order to get an alloy that is 30 percent copper?

The question can be rewritten as the following equation: (20%x + 60%100)/(100+x) = 30% Where x is the amount of 20% copper you need to add. This equation can be solved by first multiplying both sides by (100+x) to get: 20%x + 60%100 = 30%100 + 30%x Now 30%100 can be subtracted from both sides 20%x + 30%100 = 30%x Now 20%x can be subtracted from both sides 30%100 = 10%x Now both sides can be divided by 10% 300 = x Thus you need to add 300 ounces of 20% copper alloy in order to get an alloy that totals 30% copper.


Why is the penny no longer 99 percent copper?

In 1982, the composition of the penny was changed from 95% copper/5% zinc to 97.5% zinc/2.5% copper (in the form of a thin 100% copper plating on a 100% zinc planchet). This was done because the price of the copper in a 95% copper cent was greater than one cent.


What year was the Canadian penny 100 percent copper?

Never. The highest percentage of copper in Canadian pennies was 98%, during the years 1942-1996.


What is the probability in percent that a single coin toss will result in heads or tails?

It is 100%. The coin will result in heads or tails since there are no other possible outcomes.


What is 100 percent bronze?

Bronze is a mixture of copper and tin. And is pretty resistant to corrosion. Bronze is already a mixture, so 100% is a bit meaningless.