What is Magnetism? Properties of Magnets: Magnet: any material that attracts iron and materials that contain iron Magnets attract iron and materials that contain iron. magnets attract or repel other magnets. In addition‚ one part of a magnet will always point north when allowed to swing freely. Magnetic Poles: Magnetic Pole: any magnet with 2 ends‚ each is called a magnetic pole. Magnetic poles that are unlike attract each other and magnetic poles that are alike repel each other. Magnetic
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Electricity was first researched by Thales of Miletos around 600BC. He conducted a few experiments on static electricity in which he believed that friction made amber become magnetized. Other than the fact that people knew that eels produced electric shocks‚ electricity was little more than an intellectual curiosity for over 2000 years. Until 1600 when someone from England discovered the lodestone effect when amber with static would attract small objects towards it. In the 18th century‚ Benjamin
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Lecture Notes: Basic Electricity Fall 2011 This course module introduces the basic physical models by which we explain the flow of electricity. The Bohr model of an atom – a nucleus surrounded by shells of electrons traveling in discrete orbits – is presented. Electrical current is described as a flow of electrons. Ohm’s law – the relationship between voltage‚ current and electrical resistance – is introduced. Learning Objectives Understanding the basic principles of electricity is a foundational
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CHAPTER - 12 ELECTRICITY HOTS Questions for Practice 1. Name a substance whose resistance almost remains unchanged by increase of temperature. 2. Name two special characteristics of heater coil. 3. A wire of resistance 4 ohms is bent to form a circle. What is the resistance between two diametrically opposite ends? 4. How does the resistance of a conductor change if its temperature is increased? 5. A current of 4A flows in a wire of resistance 60 ohms. Calculate electrical energy consumed in 2 minutes
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Science has completely changed the pattern of man’s life. Our life today is radically different from forefathers. Even a few hundred years ago man was largely at the mercy of nature. Whenever there was a calamity‚ the only consolation lay in the message contained in the proverb‚ "What cannot be cured must be endured". But science has enhanced man’s power over nature and so he has gained confidence in himself. Science has made life comfortable. We do not cover long distances on foot to meet our
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The Value of Human Life: A Comparison & Contrast on Various Models Employed Faculty of Economics Outline There is increasing debate on the question in what value should be placed upon human life. Numerous agencies and policy makers have taken great interest in tackling the issue of human life valuation. Although there is increasing controversies that surround producing estimates for valuing a human life‚ it is imperative to understand the importance of reaching an economic value
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Purpose of a human life depends on the person who has it. Most of the people find it useful or meaningful if they had something or someone that fulfills their immaterial or material desires and contradictory for those people that doesn’t have that fulfills theirs. As I far as I know‚ human gives different meanings or purposes on their lives; in good way and bad. That is why answering this question is a bit tricky for us. Many people ask the same question in many different varieties‚ but searching
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taught an uncountable number of life lessons. One of the outstanding lessons that each and every person has learned is that killing another human being is wrong. This is perhaps the first recognizable lesson on the value of human life. Most children know that killing is against the law and learn religiously that it goes against all religious morals and beliefs‚ yet society is bombarded by violence everyday in the media and in real life. Today‚ the value of human life can be questioned‚ especially
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Electricity market in India . Anant Ashok Lohar Anant.lohar@hotmail.com Abstract-- A robust trading system is very important for free and fair competitive electricity market operation. Trading system should be capable of risk hedging associated with price volatility and other unexpected changes. Operating behavior of a competitive power market is significantly affected by the trading arrangements‚ strategic bidding‚ market model and rule. Trading arrangement is properly
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to see what it’s like to kill another human being. These families are the ones that suffer and can never get back what they lost. These teenagers do deserve a sentence of life without parole because they have committed such heinous crimes. I agree with the minority of the Supreme Court Justices who believe in mandatory life without parole because those adolescents broke the law‚ you must think about the victim’s family‚ and these teenagers killed another human being and planned to do so. Although
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