0
That's true for cents made from 1793 to 1942 and from 1944 up to mid-1982. They were struck in homogeneous metals, either pure copper or alloys that mixed copper with bronze, tin, zinc, and/or nickel.
In 1943 cents were struck on steel blanks to save copper for the war effort; they were coated with zinc to keep the steel from rusting so they are not homogeneous.
In 1982 the price of copper rose to where a penny cost more than a penny to make, so the mint switched to using copper-plated zinc.
Note there is a specific category for Coins and Currency that makes it much easier to find numismatic questions.
Wiki User
∙ 16y ago
Wiki User
∙ 14y agoWhile the process of copper refining is not 100% perfect, so that there will be small traces of other elements than copper in copper tubing, I would still say that for any ordinary purpose, copper tubing is homogeneous. It's very nearly all copper.
Wiki User
∙ 9y agoCopper tubing is homogenous.
Add your answer:
Earn +20 pts
What is the common material used for evaporator tubing when using fluorocarbons?
copper tubing
How to repair cut underground copper tubing from propane tank?
Copper tubing that is underground must be one complete piece.No connectors,no repairs.All fittings must be above ground.Also all underground copper tubing must be plastic coated to protect it from oxidation.
Would is better for energy glass rod cotton string plastic tubing or copper penny?
Copper penny
Where can one buy copper tubing?
There are many places that one could purchase copper tubing. One could try the website Amazon as that website has a large selection of many items or one could try a local hardware chain such as Home Depot.
Is brass an element compound or a homogeneous mixture or a heterogeneous mixture?
Brass is a homogeneous mixture. It is made up of a combination of copper and zinc, which are two elements. As a homogeneous mixture, brass has a uniform composition and properties throughout.
Is copper tubing a homogeneous or a heterogeneous?
Homogeneous
Copper Tubing?
form_title= Copper Tubing form_header= Have the supplies you need for all of your home improvement tasks. How much tubing do you need?*= _ [50] Will the tubing be used for liquids?*= () Yes () No Please describe the project in detail.*= _ [50]
How do you bend copper pipes?
Depends if the copper tubing is annealed or drawn type as not all copper tubing if bendable
Lever type tubing benders are best used for what copper?
tubing benders are the best used for
Is copper tubing pure copper?
No is is only 99.999 % puure
Aqueous solution of copper sulphate is a homogeneous mixture?
an aqueous solution of copper sulphate is homogeneous
What is used to support vertical copper tubing against wood blocking?
The popular and proper mounting technique for copper tubing is a copper tubing clamp for the appropriate size. This clamp is made of copper and should be mounted with copper nails. It resembles a piece of tubing of the appropriate size, a half inch wide with two ears on either side with holes for nailing.
Is copper wire a pure substance heterogeneous mixture or homogeneous?
copper is an ELEMENT therefore it is not a heterogeneous OR homogeneous mixture.
What is the common material used for evaporator tubing when using fluorocarbons?
copper tubing
What is the best tool for cutting copper tubing?
Copper tubing is best cut with a straight saw, ideally diamond tipped for the cleanest cut.
Is copper oxide homogeneous or heterogeneous?
Homogeneous
Is copper tubing homo or hetero?
Homo
