EESC 1158 Lecture Notes - Thermosphere, University Of Manchester, Outerspace
11 Mar 2014
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Document Summary
All falling objects accelerate at the same rate. On earth, the acceleration due to gravity is about 10m/sec. Air is mixture of many different gases and solid particles; not a constant composition. If water vapor, dust, and other variable components were removed from atmosphere: The remaining clear, dry air is quite similar anywhere on earth. Atmosphere begins at earth"s land-sea surface and extends upward. Atmospheric pressue: weight of the air above a given surface. Since we live at the bottom of a layer of air we are subject to the weight of all the air above us. Higher we go less air there is above us. Altitude of 5. 6km pressure is about half of its value at sea-level. There is no definite boundary where the atmosphere ends and outer-space begins. As atmospheric pressure decreases steadily with increasing heightthe temperature : decreases increases decreases increases. Atmosphere is divided into four layers on basis of temperature:
