you have found three metal bars all painted white. one bar is a magnet, one is made from copper and one is a pice of iron. using nothing else how can you fing out which is which
2007-09-19 06:48:15 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Physics
The copper one will be attracted to the magnet, wherease the iron one will not be.
2007-09-19 06:56:21 · answer #1 · answered by betatesterwood 3 · 0⤊ 1⤋
The copper bar will be attracted to neither the ends nor the middle of either the iron bar or the magnet.
The iron bar will be attracted to the ends of the magnet, but not to the middle..
The end of the magnet will be attracted to the full length of the iron bar.
Here's how you do it.
Pick up a bar. Touch its end to the ends of each of the other bars. If nothing happens, then the bar in your hand is copper. If it attracts one, then touch the end of your bar to the middle of the one it attracted. If it still attracts, then you're holding the magnet, and the other one is iron. If not, then the reverse.
2007-09-19 09:12:10 · answer #2 · answered by skeptik 7 · 1⤊ 0⤋
The copper will stick to neither.
The iron will stick to 1 (the magnet)
The magnet will stick to 1 (the iron)
So you can eliminate the copper. hmmmmm....need to think.
"Using nothing else". Still thinking.
2007-09-19 06:58:57 · answer #3 · answered by Anonymous · 0⤊ 0⤋
um putting your watch or ring to them nd which ever one it sticks to is the magnet, nd copper usually has a reaction to paint so it'll b a different color, or u can scratch of the paint nd see which one has the color of copper nd then u'll know which one the iron is:) hope i helped
2007-09-19 06:56:52 · answer #4 · answered by Anonymous · 0⤊ 0⤋
If I can't use anything then its impossible, I need to use my brain. But, maybe I could taste them?
2007-09-19 06:56:12 · answer #5 · answered by Guest 2 · 0⤊ 0⤋