SUMMARY Magnetic levitation is the process of levitating an object by exploiting magnetic fields. If the magnetic force of attraction is used‚ it is known as magnetic suspension. If magnetic repulsion is used‚ it is known as magnetic levitation. In the past‚ magnetic levitation was attempted by using permanent magnets. Earnshaw’s theorem however‚ proves that this is mathematically impossible. There exists no arrangement of static magnets of charges that can stably levitate an object. There
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unit of power is Watt 10 Radium was discovered by Marie and Pierrie Curie 11 The existence of isotopes was discovered by Frederick Soddy 12 Dynamo was invented by Michael Faraday 13 The nuclear reactor was invented by Enrico Ferni 14 The law of gravitation was propounded by Sir Isaac Newton 15 Crescograph was invented by J.C.Bose 16 Crescograph is used to measure the Rate of growth of a plant 17 Galileo’s first scientific discovery was Pendulum 18 Microscope was invented by Aaton Van Leewen Hock 19
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Did Popper solve the problem of induction? Introduction Inductive reasoning is the basis upon which we build our lives‚ thoughts‚ and knowledge. It is perhaps the cornerstone to all knowledge that we have ever gathered and use. However‚ is it rationally justified? Can we know that our method of inductive reasoning will lead us to a valid conclusion? The answer to this is surprisingly no. We will look closely at the problem of induction‚ and 20th century philosopher Karl Popper’s solution to this
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The Columbian Exchange was the trafficking of goods‚ ideas‚ and disease between the Americas and Europe that took place during and after the Age of Exploration. From the Americas‚ Europe would get new crops such as corn‚ white and sweet potatoes‚ tomatoes and tobacco. Europe would also see some new diseases originating from the Americas‚ most notably syphilis. Though not as rich in large food animals as Europe‚ some New World animals would make their way back including turkeys. The major portion
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GEOGRAPHY: AUSTRALIA’S NATURAL RESOURCES >> NATURAL MINERALS Part 1: Geographic Spread of Natural Resources. Listed below are some examples of Australia’s most popular Natural Minerals * Aluminum/ Bauxite (Al203.3H20): Australia is the largest producer of both bauxite and alumina in the world. Bauxite is mined in Queensland‚ the Northern Territory‚ and Western Australia. * Copper (Cu): In Australia‚ copper is found mainly in rocks more than 250 million years
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Chapter 11 CHEMICAL REACTIONS 153 CHAPTER 11 11. Chemical Reactions All living beings born in this beautiful world have their own life styles. Have you observed and analyzed your daily life from the view point of a chemist? Chemical reactions happen around us all the time and even in our body. Any change can be classified as physical change and chemical change. Physical changes can be easily reversed but‚ it is not easy to reverse a chemical change. What is the reason? In chemical
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Women in Mathematics Every human is created with a gift of some sort. Whether it is an athletic ability‚ a wonderful singing voice‚ or an ability to relate to other individuals‚ every one has a special gifting. For many women in history‚ their ability was deciphering and understanding the intricacies of math. Although various cultures discouraged women mathematicians‚ these women were able to re-define the standards for women in this field of study. Hypatia of Alexandria was born in Roman Egypt
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1.1 GRAVITY AND GRAVITATIONAL FIELDS 1.1.1 Define weight as the force on an object due to a gravitational field. Weight is the force experienced by an object due to the presence of a gravitational field. This force is directly related to the strength of the gravitational field acting on an object and the mass of that object. m = mass‚ g = acceleration due to gravity m = mass‚ g = acceleration due to gravity Fg = mg Fg = mg 1.1.2 Explain that a change in gravitational
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| | Assignment 2 | | Subject: General ChemistryLecturer: Dr. Ajith H. Herath | | Name: Kavini de Silva | 4/5/’013 | | BOHR THEORY Introduction Niels Bohr applies quantum theory Rutherford’s Atomic Structure by assuming that electrons travel in stationary orbits defined by their angular momentum. This led to the calculation of possible energy levels for these orbits and the postulation that the emission of light occurs when an electron moves into a lower
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BC Calculus Post AP Exam Assignment: 500 BC-1 AD: Euclid‚ alive around 300 BC‚ completely transformed mathematics. His influence is extremely evident today in the fields of geometry‚ arithmetic‚ and optics. Living in a time when questioning thought‚ trying to understand the changing world‚ and developing ideas that could help understand the natural world‚ Euclid was able to identify and create ideas that transformed the way people viewed the world into a more mathematical‚ logical‚ and
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