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Lecture Notes 17: Multipole Expansion of the Magnetic Vector Potential, A; Magnetic Multipoles; B = Curl A
Lecture Notes 17: Multipole Expansion of the Magnetic Vector Potential, A; Magnetic Multipoles; B = Curl A

... It is easiest to first calculate the magnetic vector potential A ( r ) and then calculate the corresponding magnetic field B ( r ) = ∇ × A ( r ) associated with a magnetic dipole moment m by choosing (without any loss of generality) to have the origin ϑ at the location of the magnetic dipole, i.e. p ...
Plate Tectonics Test Review
Plate Tectonics Test Review

... • This causes the crust of the earth to move around ...
Plate Tectonic, Earthquakes, and Volcanoes Test Review
Plate Tectonic, Earthquakes, and Volcanoes Test Review

... We know that the __outer core_ layer is liquid because of _seismic____ waves that are produced by _earthquakes___________. ...
Energy - eBoard
Energy - eBoard

... 12. Longitude lines (meridians) are drawn from North Pole to South Pole and are measure from east to west (Prime Meridian). 13. Latitude is based on the altitude of Polaris, (the North Star). 14. Longitude is based on the observations of the sun (also a star). 15. The closer the isolines (isotherms, ...
5. I can evaluate Alfred Wegner`s theory of continental drift based on
5. I can evaluate Alfred Wegner`s theory of continental drift based on

Unit 15(Some Natural Phenomena)
Unit 15(Some Natural Phenomena)

... screen of a television or computer monitor (with picture tube), you get a slight shock. Why does it happen? 21. Explain how does lightning conductor protects a building from getting struck by lightning. 22. In an electroscope if a negatively charged body is brought in contact with the metal clip, th ...
The surface of Earth is made of several pieces, called plates, that
The surface of Earth is made of several pieces, called plates, that

... past each other or diving one under the other. The plates may move only a few inches or feet at a time, but the movement creates a shockwave in the ground that can cause terrible damage and injury to people if their buildings are too flimsy to stand the shaking. Mountain ranges form when one plate s ...
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File

... support his theory. Provide at least three (but there are more). Which evidence did Wegner not use to support his theory? Why? How did you piece together the map? Why did you make the decision to put certain land masses together? According to the data, the land masses must have moved. How long do yo ...
Welcome to GEOLOGY
Welcome to GEOLOGY

... Specifically, geology is defined as: the study of the planet earth--- materials of which it is made, the internal/external processes that act on these materials which produce new materials (rock types) and the history of the planet and its life forms since its origin Specific disciplines within the ...
Plate Tectonics
Plate Tectonics

...  Ex. Hot water is less dense than cold water and ...
Module 8 Electromagnetism
Module 8 Electromagnetism

magnetism - Sakshi Education
magnetism - Sakshi Education

... 2. Properties of a magnet: a) When a magnet is freely suspended or pivoted, it comes to rest showing north and south directions. b) Like poles repel and unlike poles attract each other (Dufay’s law). c) A magnet attracts substances like iron, nickel, cobalt, steel etc. d) A magnet imparts its proper ...
Create an Office Mix
Create an Office Mix

... • EquiPulse can be used on the whole body. Shockwave can only be done on a specific point that are relatively insensitive, such as back or legs. • EquiPulse is Non-invasive, NO sedation is required, while horses quickly relax and enjoy the treatment. Shockwave is invasive and painful as it creates e ...
Sources of magnetic field
Sources of magnetic field

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... 20. Black holes are the death stage of stars. In other words the remains of dead stars are what form black holes. 21. Earth is located in the Milky Way Galaxy. The Milky Way Galaxy is a spiral galaxy. 22. Galaxies are classified as either elliptical, spiral or irregular. 23. The Hubble Space Telesc ...
Slide 1
Slide 1

... earth’s surface -broken into more than a dozen slabs of rock called plates that rest on layer of the upper mantle -these plates carry earth’s oceans & continents ...
CV - Blake Dyer
CV - Blake Dyer

Passive margin
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Rocks - Images
Rocks - Images

... – As magma cools, iron-rich sediment aligns with magnetic field of Earth – It has been found that the magnetic field of the Earth has changed through time – Pattern of alternating normal and reversed polarity in rocks – Striped magnetic pattern was mirror image on both sides of rift ...
8-2.3, 8-2.4, 8-2.5 Notes
8-2.3, 8-2.4, 8-2.5 Notes

... 8-2.5 Illustrate the vast diversity of life that has been present on Earth over time by using the geologic time scale. It is essential for students to know that the geologic time scale is a record of the major events and diversity of life forms present in Earth’s history.  The geologic time scale b ...
Internal Structure of the Earth and Pangean
Internal Structure of the Earth and Pangean

... we live. Convective motion in the hot upper mantle moves the pieces of broken crust (called plates). This motion causes various interactions between plates that are collectively called plate tectonics. The theory of plate tectonics is a relatively recent theory (1970s); however Alfred Wegner suggest ...
Plate Tectonics - Purdue University
Plate Tectonics - Purdue University

... Linear underwater mountain ranges in every ocean = Mid-Ocean Ridges 1947: the sediment layer on the ocean floor is very thin. If oceans were the same age as the continents (billions of years), where was all the sediment? Oceanic crust not as old as continental crust. Magnetic maps of the seafloor ma ...
PlateBoundaries_Background
PlateBoundaries_Background

... Plate Tectonics—the theory supported by a wide range of evidence that considers the earth’s crust and upper mantle to be composed of several large, thin, relatively rigid plates that move relative to one another. Slip on faults that define the plate boundaries commonly results in earthquakes. Severa ...
a copy of this article as a PDF
a copy of this article as a PDF

... The first successful guitar pickup was developed in the early 1930’s by Rickenbacker® to help amplify Hawaiian lap steel guitars which were popular at the time. The first pickups were single-coils and while they do a good job of picking up the guitar signal they are also susceptible to picking up in ...
Lecture 8: Mirror / tokamak
Lecture 8: Mirror / tokamak

... associated with the pulsed character One can either: live with it / drive current another way / use a different concept ...
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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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