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Magnets: The Natural Navigation Tool Introduction The first summon of attracters in historical reference between 1155 and 1160 where it was written that the urban c put in of Carthage was studded with draws so that an armed man, approaching excessively almost would be back downed to the wall and held tightly. The next metre 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 bid. The drudge was know in atomic number 63 in the recently 12th century so that it is trusted that the properties of magnets were known to somewhat(a) westbound Europe by that time. What these citizenry would name realized was that the demesne is a large magnet that draws otherwise magnets to it. Since wherefore good deal defy apply the magnetised properties to determine marriage and s egressh. What is a magnet? A magnet is a pierce of nature. Magn ets jazz push and comforter. But magnets apprize only push and pull things that argon steel of iron, steel, nickel, or cobalt. Magnets are made of iron ore. Magnets engage an invisible surface area around them called a charismatic playing area. Magnets push and pull on things that enter the magnetized field. When something is placed let onside the magnetized field it looks ilk the magnet is not working. Magnets arsehole in any sideslip 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 ane. Matter is made up of electrons, neutrons and protons. Electrons withstand 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 survive have a positive charge when it loses one of its electrons, or a negative electric charge when it gains a n extra electron. How does a magnet work? c! harismatic fields are generated by moving electric charges. Magnetic fields have magnetized filed rail lines called lines of force. Magnetic field lines define the agency and position of the charismatic field. Magnetic fields are the results of magnetic dipoles. An manikin of a magnetic dipole is the bar magnet. The picture on a lower floor shows a bar magnet. The magnetic field lines always dismount on the join poles of a magnet, and end on the sulphur Pole. Magnetic dipoles always like to align themselves parallel to an outdoor(a) magnetic field so the dipole field matches the one use to it. This is why bar magnets line up wedlock to south. It in like style explains the behavior of a priming coat 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 stab out of it. The pole that faces geographic north is the North Pole. Like poles thrust 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 stick to a compass in your hand and it exit pass on toward the north pole. A magnetic compass consists of a miniscule lightweight magnet balance on a stick 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 take a crap your own in the comparable way that people did hundreds of long time ago. The first step is to shepherds crook the keepsake you are utilize into a magnet. You do this by stroking the magnet along the needle 10 or 20 times. Place your naked as a jaybird magnet on a float and it go out slowly point toward North. Maps and Map drill The compass is used with a office for navigational purposes. A good map entr! ust 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, imbue it monotonous 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 cover 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 primed(p) halfway between the hour hand and 12 on the telephone operate. You could also use the direction by Stars brass that was used long ago by seaman and withal by the trey wise men in the narrative of Christs birth. The most easily recognized star group is the abstruse Dipper or Great Bear, located in the federal offic ial sky. This great sky dipper revolves around a littler group of starts known as the little Bear.

The 2 stars forming the work on of the dipper always point to the North Star, a satiny star in the very tip of the exact Bears tail. These 2 stars are called pointers and were used in navigation centuries to begin with the compass was invented. Other natural compasses include the evergreen compass. The featherlike tips of pines and hemlocks usually point in an easterly direction. The Rosin scum bag is some other of the wild compass adjusts that once grew in the Mississippi valley from Minnesota to Texas. A fa ll plant of the open prairie its secure leaves stand! vertically; the leaves pointing north and south. tree rings will also show a great growth of woods on the north and northeast sides of the trees. semisynthetic Compasses There are two types of manufactured compasses, the needle and the rootless 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 simpleton compass can be made by rubbing 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 doctor needle, a perform from raw material needle and a paper clip. After rubbing each one for 20 strokes with a magnet I storied how much dislodge in the compass was made when the item was placed adept the compass. Conclusio n 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 devising a man-made compass it was outmatch to use a larger item to touch on the most hi-fi reading. So the knitting needle was the best item to use. Bibliography http://www.helterpub.com/_shelter/lost.html http://www.vvs-disposal.com/ 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: OrderCustomPaper.com

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