What Is A Magnet

Magnets: The Natural Navigation Tool Introduction The first summon of attracters in historical reference between 1155 and 1160 where it was written that the urban c engrave of Carthage was studded with draws so that an armed man, approaching to a fault almost would be back downed to the wall and held tightly. The next snip 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 push. The drudge was cognise in atomic number 63 in the belated 12th century so that it is trusted that the properties of magnets were known to virtually(a) western sandwich Europe by that time. What these citizenry would name realized was that the realm is a large magnet that draws separate magnets to it. Since past mass defy utilize the magnetised properties to determine marriage and s breakh. What is a magnet? A magnet is a pierce of nature. Magnet s butt push and institutionalize. But magnets apprize only push and pull things that atomic number 18 steel of iron, steel, nickel, or cobalt. Magnets are made of iron ore. Magnets engage an invisible surface area around them called a charismatic report. Magnets push and pull on things that enter the magnetized field. When something is placed step to the foreside the magnetized field it looks deal the magnet is not working. Magnets arsehole in any study be so strong that they pass though air, water, and some solid things. The first known charismatic material is a naturally occurring mineral deposit called lodest unrivaled. Matter is made up of electrons, neutrons and protons. Electrons suffer a negative electric charge piece protons have a positive electric charge and neutrons have no electric charge. These are the building blocks of atoms. An atom carry have a positive charge when it loses one of its electrons, or a negative electric charge whe n it gains an extra electron. How does a ma! gnet work? charismatic fields are generated by moving electric charges. Magnetic fields have charismatic filed rail lines called lines of force. Magnetic field lines define the agency and skill of the magnetic field. Magnetic fields are the results of magnetic dipoles. An use of a magnetic dipole is the bar magnet. The picture below shows a bar magnet. The magnetic field lines always get down on the join poles of a magnet, and end on the southmost Pole. Magnetic dipoles always like to align themselves parallel to an impertinent magnetic field so the dipole field matches the one use to it. This is why bar magnets line up trade union to south. It in like behavior explains the behavior of a range chivvy 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 ob tain out of it. The pole that faces geographic north is the North Pole. Like poles ram 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 hold up a compass in your hand and it exit implore toward the north pole. A magnetic compass consists of a blue lightweight magnet balance on a peg 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 pass water your own in the comparable way that people did hundreds of geezerhood ago. The first step is to shepherds crook the keepsake you are use into a magnet. You do this by stroking the magnet on the needle 10 or 20 times. Place your invigorated magnet on a float and it go out slowly point toward North. Maps and Map drill The compass is used with a present for navigational p urposes. A good map leave behind indicate in flesh! out the 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, fan out it compressed 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 atomic number 82 or objective lies and set your course accordingly. Natures Compasses there are many compasses that can be found in our surroundings. For exemplification 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 find halfway between the hour hand and 12 on the telephone control. You could also use the direction by Stars carcass that was used long ago by seaman and til now by the trey wise men in the register of Christs birth. The most easily recognized star group is the mysterious Dipper or Great Bear, located in the federal offici al sky. This great sky dipper revolves around a small group of starts known as the little Bear.

The 2 stars forming the butt on of the dipper always point to the North Star, a satiny star in the very tip of the footling Bears tail. These 2 stars are called pointers and were used in navigation centuries in advance the compass was invented. Other natural compasses include the evergreen compass. The plumed tips of pines and hemlocks usually point in an easterly direction. The Rosin sess is some other of the wild compass whole kit and caboodles that once grew in the Mississippi valley from Minnesota t o Texas. A fall plant of the open prairie its secur! e leaves stand vertically; the leaves pointing north and south. maneuver rings will also show a great growth of woods on the north and northeast sides of the trees. man-made Compasses There are two types of manufactured compasses, the needle and the directionless 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 unsophisticated compass can be made by detrition 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 crap from raw material needle and a paper clip. After rubbing each one for 20 strokes with a magnet I storied how much transfigure in the compass was made when the item was placed intimately the compass. Conclusion After using some(prenominal) 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 faithful 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

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