Source 1:http://van.physics.illinois.edu/qa/listing.php?id=13451
Some kinds of metals (like steel that the needles are made of) are made up of billions and billions of individual atoms that each have the properties of a microscopic magnet. The atoms in steel naturally tend to get together in tiny little groups called domains, and within each domain the atoms tend to point in the same direction, which makes the domains behave like a tiny little bar magnets just like the kind you have probably played with at school. The needle of a compass is also a bar magnet, and we know what this does: it points north because it likes to line itself up with the magnetic field of the earth.
"However, if you bring the needle close to another …show more content…
A magnet has two poles, called the north pole and the south pole. The two poles may look the same but they behave differently. Put one pole of a magnet near to a pole of another magnet, and watch what happens. You may feel an attraction (pulling) force as the two poles stick together. Alternatively, you may feel a repulsion (pushing) force, as the two poles push away from each other. In all magnets, identical poles will repel (push away) each other. In all magnets, identical poles will repel (push away) each other, while different poles will pull towards each other." Magnets can be many shapes and sizes but they all have the ability to pull things toward themselves. The invisible force that allows magnets to pull things toward themselves is called magnetism. Most magnets are usually made up of a material with lots of iron in it or just iron. Magnets also only pull objects that contain iron or just iron. Source5:http://science.howstuffworks.com/question22.htm "fans actually add heat to a room. One way to think about it is like this: If you have a perfectly insulated room and you put an electric fan in it, then the room will get warmer. All the electricity that is driving the fan turns directly into heat.
So a fan does not cool the room at all. What a fan does is creates a wind chill
Some kinds of metals (like steel that the needles are made of) are made up of billions and billions of individual atoms that each have the properties of a microscopic magnet. The atoms in steel naturally tend to get together in tiny little groups called domains, and within each domain the atoms tend to point in the same direction, which makes the domains behave like a tiny little bar magnets just like the kind you have probably played with at school. The needle of a compass is also a bar magnet, and we know what this does: it points north because it likes to line itself up with the magnetic field of the earth.
"However, if you bring the needle close to another …show more content…
A magnet has two poles, called the north pole and the south pole. The two poles may look the same but they behave differently. Put one pole of a magnet near to a pole of another magnet, and watch what happens. You may feel an attraction (pulling) force as the two poles stick together. Alternatively, you may feel a repulsion (pushing) force, as the two poles push away from each other. In all magnets, identical poles will repel (push away) each other. In all magnets, identical poles will repel (push away) each other, while different poles will pull towards each other." Magnets can be many shapes and sizes but they all have the ability to pull things toward themselves. The invisible force that allows magnets to pull things toward themselves is called magnetism. Most magnets are usually made up of a material with lots of iron in it or just iron. Magnets also only pull objects that contain iron or just iron. Source5:http://science.howstuffworks.com/question22.htm "fans actually add heat to a room. One way to think about it is like this: If you have a perfectly insulated room and you put an electric fan in it, then the room will get warmer. All the electricity that is driving the fan turns directly into heat.
So a fan does not cool the room at all. What a fan does is creates a wind chill