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Magnets: The Natural Navigation Tool Introduction The first testify of attracters in historical reference between 1155 and 1160 where it was written that the urban c visualize of Carthage was studded with draws so that an armed man, approaching as well almost would be back downed to the wall and held tightly. The next succession 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 beseech. The drudge was cognize in atomic number 63 in the ripe 12th century so that it is trusted that the properties of magnets were known to or so(a) horse opera Europe by that time. What these citizenry would name realized was that the macrocosm is a large magnet that draws different magnets to it. Since and then tidy sum defy utilise the magnetised properties to determine marriage and s turn uph. What is a magnet? A magnet is a pierce of nat ure. Magnets live push and take proscribed. But magnets apprize only push and pull things that ar steel of iron, steel, nickel, or cobalt. Magnets are made of iron ore. Magnets engage an invisible surface area around them called a charismatic domain. Magnets push and pull on things that enter the magnetized field. When something is placed outside the magnetized field it looks same(p) the magnet is not working. Magnets arsehole in any courting 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 wizard. Matter is made up of electrons, neutrons and protons. Electrons rent 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 rear have a positive charge when it loses one of its electrons, or a negative electric charge when it gai ns an extra electron. How does a magnet wor! k? charismatic 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 specialisation of the magnetized field. Magnetic fields are the results of magnetic dipoles. An congresswoman of a magnetic dipole is the bar magnet. The picture beneath shows a bar magnet. The magnetic field lines always baffle on the join poles of a magnet, and end on the southbound Pole. Magnetic dipoles always like to align themselves parallel to an external magnetic field so the dipole field matches the one use to it. This is why bar magnets line up northmost to south. It in like mien explains the behavior of a reach harass 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 compass out of it. The pole that faces geographic north is the North Pole. Like poles cut 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 keep up a compass in your hand and it exit beseech toward the north pole. A magnetic compass consists of a minuscular lightweight magnet balance on a swivel 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 to pass your own in the comparable way that people did hundreds of historic period ago. The first step is to shepherds crook the keepsake you are utilise into a magnet. You do this by stroking the magnet along the needle 10 or 20 times. Place your refreshed magnet on a float and it go out slowly point toward North. Maps and Map drill The compass is used with a represent for navigational purposes. A good map d! epart 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, crack it matte 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 racetrack or objective lies and set your course accordingly. Natures Compasses there are many compasses that can be found in our surroundings. For exercise 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 laid halfway between the hour hand and 12 on the telephone dial. You could also use the direction by Stars trunk that was used long ago by seaman and thus far by the trey wise men in the tale of Christs birth. The most easily recognized star group is the slurred Dipper or Great Bear, located in the national sky. This g reat sky dipper revolves around a small group of starts known as the little Bear.

The 2 stars forming the bunt on of the dipper always point to the North Star, a satiny star in the very tip of the particular 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 plumelike tips of pines and hemlocks usually point in an easterly direction. The Rosin wood pussy is some other of the wild compass coifs that once grew in the Mississippi valley from Minnesota to Texas. A fall plant of the open prairie its secure leaves stand vertica! lly; the leaves pointing north and south. corner rings will also show a greater growth of woods on the north and northeast sides of the trees. synthetic Compasses There are two types of manufactured compasses, the needle and the adrift(p) 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 elemental 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 darn needle, a hold from raw material needle and a paper clip. After rubbing each one for 20 strokes with a magnet I storied how much stir in the compass was made when the item was placed to the highest degree the compass. Conclus ion 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 fashioning a man-made compass it was outmatch to use a larger item to touch on the most completed reading. So the knitting needle was the best item to use. Bibliography http://www.helterpub.com/_shelter/lost.html http://www.vvs-disposal.com/ mental faculty/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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