What Is A Magnet

Magnets: The Natural Navigation Tool Introduction The first testify of attracters in historical reference between 1155 and 1160 where it was written that the urban c present of Carthage was studded with draws so that an armed man, approaching too almost would be back downed to the wall and held tightly. The next conviction magnets be menti hotshotd in writing was in 1231-6 by the Bishop of Paris. He explained the motion of the aeriform spheres by analogy to the ability of a magnet to jinx a piece of conjure. The drudge was know in atomic number 63 in the posthumous 12th century so that it is trusted that the properties of magnets were known to few(a) westerly Europe by that time. What these citizenry would name realized was that the humans is a large magnet that draws other(a) magnets to it. Since thusly throng defy apply the magnetised properties to determine marriage and s step uph. What is a magnet? A magnet is a pierce of nature. Magnets sl eep with push and distil. But magnets apprize only push and pull things that ar steel of iron, steel, nickel, or cobalt. Magnets argon made of iron ore. Magnets engage an invisible surface area around them called a charismatic matter. Magnets push and pull on things that enter the magnetized field. When something is placed extinctside the magnetized field it looks alike the magnet is not working. Magnets arsehole in any berth be so strong that they pass though air, water, and some solid things. The first known magnetised material is a naturally occurring mineral deposit called lodest unmatched. Matter is made up of electrons, neutrons and protons. Electrons sustain a negative electric charge plot of ground protons have a positive electric charge and neutrons have no electric charge. These are the building blocks of atoms. An atom support have a positive charge when it loses one of its electrons, or a negative electric charge when it gains an extra electron. How does a magnet work? charismat! ic fields are generated by moving electric charges. Magnetic fields have magnetised filed rail lines called lines of force. Magnetic field lines define the agency and dexterity of the magnetized field. Magnetic fields are the results of magnetic dipoles. An instance of a magnetic dipole is the bar magnet. The picture below shows a bar magnet. The magnetic field lines always set down on the join poles of a magnet, and end on the southernmost Pole. Magnetic dipoles always like to align themselves parallel to an remote magnetic field so the dipole field matches the one use to it. This is why bar magnets line up northern to south. It in like modality explains the behavior of a mount spur which being made of iron behaves like a magnetic dipole. Dipole kernel two poles. The direction of magnetic field for the electron and the spotless atom moves the magnetic field either North and South. To commit the north pole of a magnet you can make a labor out of it. The pole that faces geographic north is the North Pole. Like poles revolt distributively other and oppositeness poles attract each other. So a magnet can repel other magnets. The magnetic forces of a compass testament seek north. This means that no matter where you stand on earth you can piddle a compass in your hand and it exit pick up toward the north pole. A magnetic compass consists of a piffling lightweight magnet balance on a tholepin point. The magnet is generally called a needle. One end of the needle is marked N for North. If you dont have a compass, you can bring into being your own in the comparable way that people did hundreds of days ago. The first step is to shepherds crook the keepsake you are victimization into a magnet. You do this by stroking the magnet on the needle 10 or 20 times. Place your sassy magnet on a float and it go out slowly point toward North. Maps and Map drill The compass is used with a purpose for navigational pur poses. A good map pass on indicate in flesh out th! e landmarks, streams, lakes, marshes and mountains, as well as the direction of true north and magnetic north. To lay out a course on your map, spread out it flatcar so that the north and south lines upon it will be exactly parallel with the north and south line of the compass needle. You can then note in what direction your rails or objective lies and set your course accordingly. Natures Compasses there are many compasses that can be found in our surroundings. For example if you have no compass but have a watch, you can tell direction by safekeeping it flat and pointing the hour hand toward the sun. South will be turn up halfway between the hour hand and 12 on the telephone dial. You could also use the direction by Stars carcass that was used long ago by seaman and however by the trey wise men in the storey of Christs birth. The most easily recognized star group is the dense Dipper or Great Bear, located in the federal official sky. This great sky dipper re volves around a littler group of starts known as the little Bear.

The 2 stars forming the border on of the dipper always point to the North Star, a satiny star in the very tip of the smaller Bears tail. These 2 stars are called pointers and were used in navigation centuries onwards the compass was invented. Other natural compasses include the evergreen compass. The plumy tips of pines and hemlocks usually point in an easterly direction. The Rosin smoking is some other of the wild compass localises that once grew in the Mississippi valley from Minnesota to Texas. A fall plant of the open prairie its secure leaves stand vertically; the leaves pointing! north and south. manoeuver rings will also show a greater growth of woods on the north and northeast sides of the trees. celluloid Compasses There are two types of manufactured compasses, the needle and the drifting dial. On one a needle rotates and on the other a dial rotates. Both needle and dial are magnetized at one point and swing freely on a pivot pointing north when they come to rest. The rotating dial compass is the surmount kind for wilderness traveling. A naive compass can be made by corrasion a fasten needle with a magnet and then placing it gently in a cup of water where it will float an point north. To test the usefulness of man-made compasses I used three different items of varying lengths: a repair needle, a arrive at from raw material needle and a paper clip. After rubbing each one for 20 strokes with a magnet I storied how much diverseness in the compass was made when the item was placed rise the compass. Conclusion After using some(prenom inal) items in the above manner I found that the big the item used to create the compass, the larger the magnetic force it created. I concluded that when making a man-made compass it was outmatch to use a larger item to touch on the most straight reading. So the knitting needle was the best item to use. Bibliography http://www.helterpub.com/_shelter/lost.html http://www.vvs-disposal.com/ staff/4-5/compass.html http://www.kapili.com/m/magnet.html http://scholar.chem.nyu.edu/~tekpages/magnets.html http://pbskids.org/jayjay/care.curr.cl.17.html http://www.magnequench.com/tech_resources/education/magnets_at_work.html http://www.wondermagnet.com/dev/magfaq.html If you indirect request to get a full essay, order it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay