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unit 2 universal gravitation and circular motion
unit 2 universal gravitation and circular motion

... 2. the force of attraction (Fg) between 2 masses (m1, m2)is directly proportional (if one goes up the other goes up) to the product of the masses: Fg  m1m2 3. the force of attraction between 2 masses is indirectly proportional (if one goes up the other goes down) to the square of the distance (r) b ...
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... movement has occurred. When rocks are under stress along a fracture, they can sometimes snap as the stress is released. The vibrations which travel through the ground as a result of this release of energy are known as earthquakes. Earthquakes occur all the time, but most are not felt (only detected ...
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... 3. What occurs when an oceanic plate meets a continental plate? a. convection; b. subduction; c. diversion; d. transformation 4. What is formed when two continental plates collide? a. a trench; b. mountains; c. volcanoes; d. a rift 5. The collision of two oceanic plates forms: a. a mountain; b. conv ...
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Name: Date: : Aim#15b: Earth as a Planet

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... five layers. Earth’s outer layer is the lithosphere. It is a cool, rigid layer, 15 km to 300 km thick, and includes the crust and uppermost part of the mantle. It is divided into huge pieces called tectonic plates. The asthenosphere is the layer beneath the lithosphere. The asthenosphere is a plasti ...
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... 9. Lithosphere- area where Earth’s solid upper mantle and crust combine to form a shell. 10. Core- Earth’s innermost structure. 11. The lithosphere is not one solid shell of rock. It is actually broken up into giant slabs of rock called plates. 12. Plate Tectonics- idea that giant plates of rock are ...
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Schiehallion experiment



The Schiehallion experiment was an 18th-century experiment to determine the mean density of the Earth. Funded by a grant from the Royal Society, it was conducted in the summer of 1774 around the Scottish mountain of Schiehallion, Perthshire. The experiment involved measuring the tiny deflection of a pendulum due to the gravitational attraction of a nearby mountain. Schiehallion was considered the ideal location after a search for candidate mountains, thanks to its isolation and almost symmetrical shape. One of the triggers for the experiment were anomalies noted during the survey of the Mason–Dixon Line.The experiment had previously been considered, but rejected, by Isaac Newton as a practical demonstration of his theory of gravitation. However, a team of scientists, notably Nevil Maskelyne, the Astronomer Royal, were convinced that the effect would be detectable and undertook to conduct the experiment. The deflection angle depended on the relative densities and volumes of the Earth and the mountain: if the density and volume of Schiehallion could be ascertained, then so could the density of the Earth. Once this was known, then this would in turn yield approximate values for those of the other planets, their moons, and the Sun, previously known only in terms of their relative ratios. As an additional benefit, the concept of contour lines, devised to simplify the process of surveying the mountain, later became a standard technique in cartography.
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