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Staff by Research Group
Staff by Research Group

... counted the total number of droplets formed and their total charge. From these, he estimated e = 2.2 x 10-19 C This can be compared with the present standard value of e = 1.602 x 10-19 C The technique was perfected by Millikan in his famous oil-drop experiment. Water droplets evaporate and so he use ...
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... Students will be introduced to qualitative relationships among mass and force as well as speed and distance. Some forces can only act on objects when they touch. Other forces, such as gravity, affect objects from a distance. Students will apply those relationships to explore what happens to objects ...
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... like soup or water in a pan you can watch the convection currents move in the liquid. When the convection currents flow in the asthenosphere they also move the crust. The crust gets a free ride with these currents, like the cork in this illustration. ...
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... Divergent Plate Boundary Discussion Questions 1. What happened to the frosting between the crackers? 2. What do the graham crackers represent? 3. What does the frosting represent? 4. Name a specific location on the Earth where this kind of boundary activity takes place. 5. What type of feature is pr ...
Chapter 6 - Cloudfront.net
Chapter 6 - Cloudfront.net

... • What is the difference between oceanic crust and continental crust? – Oceanic crust is denser (heavier) than continental crust – Ocean water is on top of the oceanic crust – Oceanic crust is made of basalt – Continental crust is made of granite ...
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... In an experiment to verify the laws of equilibrium for a set of co-planar forces acting on a uniform metre stick, a student attached four weights and two Newton meters to a metre stick. The positions of the weights and Newton meters were changed until the metre stick was in equilibrium. These positi ...
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... there is no current flowing through the system. This eliminates (a) and (b). If there is no current in the system, then there is no potential difference across the resistors. The only potential difference is across the capacitor, which equals the magnitude of the potential difference across the batt ...
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... C) comparisons between Moon rocks and Earth rocks D) well drillings from Earth’s mantle and core ...
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... The project attempted to drill as deep as possible into the Earth’s crust. Drilling began on 24 May 1970 and in 1989 the hole reached 12 Kilometers (40,230 ft about 7.6miles) and is the deepest hole ever drilled. Drilling ended in 1989 due to lack of funding, which was the same reason why scientists ...
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... Furthermore, Mohorovici figured out that the distance at which the change in slope occurred (about 150 km) can be used to calculate the depth to velocity increase from 6 to 8 km/s. He calculated that the depth to this velocity jump was about 30 km. We interpret this velocity jump as the crust­mantle ...
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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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