Science-Paulo drops a bar magnet into a box why do iron nails, why do the nails stick to th..?

the end of the magnet?


2) Paulo puts two magnets on a peice of cork. He floats the cork on the water in the plastic bowl, and it spins round slowy, What direction will the magnets point at the end of the experiment.


3)Rachel has a block of metal, she wants to know if it is a magnet. Rachel puts the block of metal in a thin plastic bag. What effect, if any will the bar magnet now have on the block?


4) Rachhel puts the bar magnet into a pile of coins. Some of the coins are attracted to the magnet but some are not. Suggest a reason for this?








REALLY NEED HELP!!!Science-Paulo drops a bar magnet into a box why do iron nails, why do the nails stick to th..?
1) Iron is a magnetic material so it is attracted to the magnet. The strength of a magnet tends to be at the poles so they will be attracted more to the ends where the poles are .


2)It is unclear how the magnets are placed exactly - both on one piece or on separate pieces of cork. If on separate pieces they will float around until they are attracted side by side with North to South poles.


3)The plastic bag will not affect the magnet field at all. So if it is a magnetic metal it will still be attracted to the magnet.


4) Recently (in the last 10 years) the ';copper'; coins in the UK have been replaced by steel coins plated with a layer of copper - this means that they are magnetic. the ';silver'; coins are cupro nickel alloy and are not magnetic.Science-Paulo drops a bar magnet into a box why do iron nails, why do the nails stick to th..?
4) Not sure for specific metals but I would guess that some metals that the coins are made of are not magnetic because coins are made of copper and nickel and maybe one more.