of the P/M green tool material plays a significant role on TWR. The loose bonding eases to erode even at low energy and shorter pulse on-time. However‚ the erosion rate decreases with increased compaction load. Higher compaction load gives strong molecular bonding. Hence‚ higher energy is required to erode the tool material. The abrupt erosion of tool material at low compact load gives non-uniform material transfer thereby; very rough surface is obtained. However‚ finer surface is obtained at low
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transfer-controlled scale growth. At higher fluid velocities‚ the scale growth rate decreases with increasing fluid velocity due to the increased flow erosion effect‚ for slurry systems. This suggests the potential of particulate erosion as a scale suppression mechanism. The model predicts the existence of an optimal slurry flow velocity‚ where scaling rate and equipment erosion rate are both zero. The optimal fluid velocity value is proposed to be used as the main parameter to improve engineering design of mineral
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Before looking at river landforms it is important to understand the more general role of rivers and to develop an awareness of the processes at work within rivers. It is through this knowledge that we will better undertand the processes at work in the geomorphology of the drainage basin. The role of rivers can be understood in very simple terms. The river’s role is to balance its load and transport it to the ocean. But this this idea of rivers as merely transporting weathered material to the ocean
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The upper course of the river starts at the source of the rivers channel. The upper course of the river is shallow and has a narrow river channel due to vertical erosion caused by hydraulic action and corrosion. It also has an uneven steep river bed due its bedload as it is large boulders as they have rough edges. This then gets transported through the upper part of the river by traction. In addition some of the bedload also gets transported by suspension and little in siltation. As the river flows
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Explain the operation of the rock cycle with reference to the geology in Hong Kong. To what extent are the rock types responsible for the deep weathering profile in the territory? Hong Kong is dominated by igneous rocks which granite takes up the largest proportion of 85% of the total land area. The remaining area is underlain by sedimentary rocks superficial deposits mainly in the North West area. Other than the above rock types‚ there still a kind of rock which covers only a small area of Hong
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Growing up‚ the end of October typically meant playing soccer and finding a costume for trick-or-treating‚ but in 2012‚ my community became saturated and preoccupied by the anticipation of a coming storm. Although northern New Jersey is not normally where hurricanes violently meet land and its inhabitants‚ the weather pattern became apparent that we were not going to escape this one. On October 29‚ Hurricane Sandy began to embrace and ravish everything impeding its chosen path. Instead of soccer
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ENDOGENOUS PROCESSES AND ASSOCIATED LANDFORMS THE EVER CHANGING LANDSCAPE • • • • • • Earth’s surface is ever changing Endogenous processess- interior of the earth Mountains‚ plateaus and plains formed Occurences of volcanoes and earthquakes Processess- slow and sudden Many areas rise or subside NOTABLE CHANGES • • • • Breaking of Gondwanaland 120 mya Indian peninsula started drifting towards north Took present shape around 40 mya Raising of Himalayas- present height during last 1 million years
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WAVES When people think of waves they may think of a nice vacation or maybe a storm. Most people may not think about what causes waves or how waves can get so tall and powerful. In addition‚ people may not think about how tides are formed. The movement of waves includes information about how waves form‚ how they move‚ what happens when waves interact‚ and some of the effects of waves. When people visit a beach‚ they might realize the daily rise and fall of the water‚ or how high and low
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Delmar Formation. This means that between the Bay Point Formation and the Torrey Sandstone‚ there are nine formations that should exist between these strata‚ yet they are not found. Bay Point Formation (120‚000 years) The Bay Point formation is a deposition of sandstone that has resulted from a marine terrace from during the Pleistocene. The sandstone was originally deposited partially in the ocean‚
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however are now faced with issues regarding enviromental degradation and habitat endangerment. There are many issues however some of the more significant problems are erosion‚ longshore drift and high rise development. There are three key factors in the geographical processes that affect the coastal enviroments. There are erosion‚ deposition and transportation. The beaches are affected bytransportation or more commonly known as longshore drift (Longshore drift is the movement of sediments‚ usually sand
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