Magnetohydrodynamic drive In concept‚ MHD is attractive because it offers a propulsion system that requires no moving parts. It works on a principle similar to that of an electric motor or generator; that is‚ passing an electrical current through a magnetic field creates a force. In an MHD propulsion system‚ a magnetic field is created within the hull‚ and sea water is used to conduct the electric current‚ as shown in the illustrations accompanying this story. The underlying principle is known
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playing with magnets as a kid‚ opposite (North and South) polarities attract‚ while like polarities (North and North‚ South and South) repel. The internal configuration of a DC motor is designed to harness the magnetic interaction between a current-carrying conductor and an external magnetic field to generate rotational motion. Let’s start by looking at a simple 2-pole DC electric motor (here red represents a magnet or winding with a "North" polarization‚ while green represents a magnet or winding
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in use on Scoraig for decades and has passed the test of time. Units The energy produced by wind turbines depends on the swept area more than it does on the alternator maximum output. Alternator The plans describe how to build a permanent magnet alternator. The alternator can be wired for 12‚ 24 or 48-volt battery charging. Essentially this choice only affects the size of wire and the number of turns per coil. But the tower wiring for the 12-volt version will be much heavier than the
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read an article about how a Prius battery could power a house‚ and then I thought about how I could power a house using a rechargeable battery like is found in the Prius. Then I came across the Bedini Wheel‚ an energy producing machine that runs on magnets. I could combine the Bedini Wheel energy to charge a Prius rechargeable battery to power a house’s electrical needs and all the appliances throughout the house. That would take care of the power bills for all the parents and cut down on the use of
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many household items. The brushed DC motor consists of a rotor (the part that rotates) containing several coils of wire. This is attached to the output shaft. The rotor is surrounded by a magnetic field (this is usually a permanent magnet‚ but can be an electro magnet). Electrical connection to the rotor is accomplished via a device called a commutator. A commutator is basically a conductive ring that rotates with the rotor shaft. This ring has been split into segments (there are as many segments
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demonstrated correlation between the charge and mass of an electron and the behavior of magnetic fields. The lab was divided into four parts. The first three parts were conducted with a compass that was used to locate the magnetic field lines around a bar magnet‚ a solenoid and then a pair of Helmholtz coils. As a result of these trials‚ our observations found evidence that magnetic field lines go from a north magnetic pole to a south magnetic pole. These results were seen in all three magnetic devices. When
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Although the world may disagree about many issues there is a commonality that continuously unites nations from all over the world‚ and it is a fundamental system in which the world cannot function without‚ the International System of Units (SI). The SI was established in 1960 by the 11th Conference of Weight and Measures; it began with 17 nations including the United States and today has become widely used among 51 nations (Historical). The SI is a metric system of units of measurement and is predominantly
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ELECTRICITY - A Secondary Energy Source A Secondary Source The Science of Electricity How Electricity is Generated/Made The Transformer - Moving Electricity Measuring Electricity energy calculator links page recent statistics A SECONDARY SOURCE Electricity is the flow of electrical power or charge. It is a secondary energy source which means that we get it from the conversion of other sources of energy‚ like coal‚ natural gas‚ oil‚ nuclear power and other natural sources‚ which are called primary
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Title: Observations of Chemical Changes Purpose: To learn about the international system of units (SI)‚ to become familiar with common lab equipment and techniques‚ to gain proficiency in determining volume‚ mass‚ length‚ and temperature of a variety of items using common laboratory measurement devices‚ to learn to combine units to determine density and concentration‚ and to use laboratory equipment to create serial dilutions and determine the density and concentration of each dilution. Procedure:
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Introduction: The Large Hadron Collider Valerie Jamieson-New Scientist Large Hadron Collider “Actually Worked” Mason Inman-National Geographic Maneesha Wijesinghe In 1909‚ at a small laboratory at the University of Manchester‚ James Rutherford shot alpha particles at a gold nucleus which in result unveiled the legendary discovery of the structure of the atom. Exactly seventy years later scientists and engineers at the European Organization for Nuclear Research (CERN) launched the Large
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