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Magnetism - APlusPhysics
Magnetism - APlusPhysics

... c. Calculate the magnitude and direction of the torque experienced by a rectangular loop of wire carrying a current in a magnetic field. 3. Fields of long current-carrying wires a. Calculate the magnitude and direction of the field at a point in the vicinity of such a wire. b. Use superposition to d ...
Chapter 5 Earth and Its Moon
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... The Earth and moon are both about the same distance from the sun, yet the Earth (on the average) is much warmer than the moon. why? A. The moon is smaller than the Earth. B. The moon's night is longer than the Earth's. C. The moon has almost no atmosphere compared with the Earth. D. The surface of ...
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... When current flows through the coil it produces its own magnetic field. The magnetic field from the coil is affected by the magnetic field from the magnet. The two fields will attract or repel each other ...
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Science Notes December 1, 2010 SOL 5.7 (b, c, d) Scientists are

... plates to move slowly about the Earth’s surface. They are not connected to one another, but move freely about. These plates can bump, push, and scrape past the other plates that are around them. The edges, or boundaries, of plates are called faults. Most volcanoes and earthquakes occur on these faul ...
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digest #: title - The Described and Captioned Media Program

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... Terminate RF pulse and let nuclei relax: MDMs return to original (z) orientation; energy released during relaxation is measured by receiver coil ...
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... a response you can have) is proportional to the time-dependent field, B. We will see later that this is a consequence of stimulated emmision. 3) By turning off and on the time-varying magnetic field we can rotate the spin vector relative to the laboratory frame, from which it subsequent to turning o ...
Palaeontology, Pangaea, Plate Tectoncs
Palaeontology, Pangaea, Plate Tectoncs

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... Magnetic moment μ (magnetic moment) = the torque (turning force) felt by a moving electrical charge as it is put in a magnet field. The size of a magnetic moment depends on how much electrical charge is moving and the strength of the magnetic field it is in. A Hydrogen proton has a ...
Unit C: Earth Science Chapter 1: The Changing Earth Lesson 1
Unit C: Earth Science Chapter 1: The Changing Earth Lesson 1

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History of geomagnetism



The history of geomagnetism is concerned with the history of the study of Earth's magnetic field. It encompasses the history of navigation using compasses, studies of the prehistoric magnetic field (archeomagnetism and paleomagnetism), and applications to plate tectonics.Magnetism has been known since prehistory, but knowledge of the Earth's field developed slowly. The horizontal direction of the Earth's field was first measured in the fourth century BC but the vertical direction was not measured until 1544 AD and the intensity was first measured in 1791. At first, compasses were thought to point towards locations in the heavens, then towards magnetic mountains. A modern experimental approach to understanding the Earth's field began with de Magnete, a book published by William Gilbert in 1600. His experiments with a magnetic model of the Earth convinced him that the Earth itself is a large magnet.
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