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What does 30 gauge mean?
The gauge is equal to the number of solid lead spheres, each with the same diameter as the inside of the barrel, that would weigh one pound.
Why was it necessary to weigh the iron filings accurately though the mass of copper sulphate taken was only approximate?
it is because iron is solid and can easily sublimes in aqueous copper sulphate
How much is an unstamped cent worth?
$1 or so if it's a current copper-plated zinc planchet, $2 or $3 if it's an older planchet made of solid bronze. A zinc planchet will weigh 2.5 gm while a solid bronze one will weigh 3.11 gm.
How much does copper penny weigh?
Copper pennies minted before 1982 weigh 3.11 grams.
Why does a 1982 penny weigh more than a 2006 penny?
In 1982 the mint struck pennies from solid bronze and from copper-plated zinc. Bronze cents weigh 3.1 grams and the zinc once weigh 2.5 grams. Bronze pennies were discontinued in mid-1982
How much does 38000 copper pennies weigh?
38000 copper pennies would weigh approximately 94.7 kilograms or 209 pounds.
What is the last year for the copper penny?
When the price of copper rose in 1982, the mint was forced to make a midyear change from solid bronze (95% copper) to copper-plated zinc. You can find cents dated 1982 made out of both metals. The only way to reliably tell them apart is to weigh them on a sensitive scale. Copper cents weigh 3.11 gm, zinc ones are 2.5 gm. To be very specific, though, the last year for pure copper US cents was 1857. All "copper" cents made since then are actually an alloy of 95% copper with the remaining 5% tin and/or zinc.
How much does 100 feet of 10 gauge copper weigh?
Depends on the thicknes of the wire. About three pounds, according to this site: http://www.rjleahy.com/Store/wire/cwi.htm See second chart on left... 10 ga copper wire is about 33 feet per pound.
What was the last year of the copper penny?
US Coins the last year for a copper (actually bronze) penny is 1982. In 1982 the penny was made as a copper coin and a copper plated zinc coin. You have to weigh them to tell the difference. Bronze cents weigh 3.11 gm and zinc ones weigh 2.5 gm. The penny has remained a copper plated zinc since 1982 however there is talk of changing it again to a copper plated steel coin. In 1943 the Lincoln US cent was steel coated with zinc because the copper was needed for ammunition during the War. In 1944 it went back the copper coin. Today the cost of copper is too high to make a solid copper coin/penny. In fact the cost of stamping/minting the coins and raw materials, the penny and nickel cost more to produce than their face value.
How much does a metal burial casket weigh?
Standard metal caskets (20ga steel) weigh around 200 lbs empty. Most solid (sheet) copper or bronze caskets have a weight between 250 and 350 lbs. Copper deposit caskets (made of electrolytically deposited copper) between 600 and 800 lbs. Cast bronze caskets (cast from molten bronze like bells) between 1,000 and 1,200 lbs.
How much does a copper penny weight?
Pre-1982 copper pennies weigh 3.11 grams. Pennies made since then are mostly zinc and weigh 2.5 grams.
How much does a lb of copper weigh?
It is impossible to give an answer. For instance, a metre of copper wire, or a metre of a copper ingot?
