Q:I am wondering what is number 1 copper and what is number 2 copper? What does it mean? What kind of copper is in a penny?

Copper is a transition metal, which means it can exist in two oxidation states. Copper 1 has a valence of 1 (meaning it has 1 electron in its outer shell) and Copper 2 has a valence of 2 (meaning it has 2 electrons in its outer shell.) The Copper in a penny is just copper. the valence doesn't come into play unless it is bonded with another element.

Q:e.g. do they add copper to the water or do they rust ?The workers are starting in like 12 hours (fixing the pipes in my sisters house) Any pros. or cons. would be greatThanks in advance

Copper is the best thing for home water pipes.

Q:I‘ve already taken the bolt off that connects the two. One came off easily while the other is not budging. Do I just bite the bullet and use pliers risking having to buy another supply line or is there another solution?I‘m a novice plumber by the way but I put these on the last time and thought it was rather easy and now I‘m trying to replace my faucet and removing the old is a b**ch!Please help!

just buy the new supply ,get the braided type. did you use basin wrench on top nut?

Q:is there a weight difference between copper and metal bb's? if so what? list everything please..thanks

BB's for air guns are typically copper-plated steel, as many or your respondents have stated. You can of course get lead and other BB shot for reloading shotshells. Lead BB's used to be packaged for air guns too, and obviously they'd be heavier. I still have a small metal can of them, I believe from the old Benjamin Air Rifle Company, maybe collectable by now. Did you know that small shot sizes can be roughly figured by subtracting the nominal shot size from the size of a 0.177 inch diameter BB? So #4 shot (for turkey hunting is about 0.14 inch, and #8 shot (for quail or skeet) is about 0.09 inch diameter.

Q:Just wondering why :)

Leonard Dale and Nick Roberts posted the same question. You should see their answers side by side.

Q:I‘m an investor, and I buy foreclosed houses, renovate them, then re-sell them as nice homes. Twice, I‘ve purchased a house where someone had gone inside, then removed and stole all the copper plumbing in the basement. Then I had to spend money to re-pipe it in order to get the water back on. Both times, the house was a HUD house, rather than a bank-owned one. I know that HUD has master keys for all of their listed properties for sale (each house could be one of 5 keys), so do thieves have a way of getting copies of HUD keys? They are basic ordinary house keys that can be easily duplicated at any hardware store.You‘d think HUD would have better security than that, like using special keys that can‘t be duplicated.

HUD keys are given ONLY to real estate agents who are qualified to possess them. But, as with any other key, they are subject to possible copy. That being said, do you not INSPECT houses before you buy them ? Anyone with functioning eyes can see that the copper piping may be missing.

Q:can i use copper pipes for LPG piping ?

Yes copper pipe 'type n' is suitable but I would still wrap it in insulation. It won't last as long as CPVC though. 1. Yes standard lead free solder is fine. 2. Grounding the pipe is not a bad idea, but I don't think it's necessary. By this I mean bonding it to your electric panel. It's all ready grounded by being underground. 3. Consider using CPVC I just think it's a better product. Copper tends to get pin hole leaks after about 7 years.

Q:A lump of pure copper weighs 25.155 in air and 22.434 when submerged in water ( = 0.9982 ) at 20.0 . Suppose the copper is then rolled into a 245- foil of uniform thickness. What will this thickness be, in millimeters? I don't understand how your supposed to figure this out! Please help.

add 25.155 and 22.434 then divide by 0.9982 and then multiply again by 245. The quantity of x+3 will lead this to your answer. I know this because i graduated from harvard.

Q:The house is 40 years old. Original copper pipes are still being used. Water pressure can be low. Probably due to calcium build up in pipes. Can these pipes be unclogged? How?

No. I had low water pressure in my pipes and I replaced them and now I have full pressure