... equation L=Cl 1/2 (pV2)S. Cl is the lift coeficent, which is determined by the shape of the airfoil and the angle of attack. P stands for the air mass density, V for the velocity of the air passing over the wing, and S for the area of the wing when viewed from above or below. As the air flows over the wing producing lift, it grabs onto the wings surface and causes drag. Drag can be measured by the equation D=Cd 1/2 (pV2)S, much like the lift equation. The drag coeficent Cd is found, again, by determining the shape of the airfoil and then finding the angle of attack. Drag is less than lift up to a certain angle of attack. After that, the air encountering the ...
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... over-wintering eggs. Such eggs are usually enclosed in a purselike ephippium that rests in the sediment at the bottom of the lake or pond until spring at which time the eggs hatch. 1. Daphnia magna. Take a small culture dish to the instructor to receive a few living D. magna. This is a very large species, as go, and one that is easily cultured in the laboratory. Return to your bench and observe the animals using the dissecting microscope. Note the characteristic jerky swimming motion. The uneven appearance of this motion is a result of there being only one pair of locomotory appendages, or oars. Try to observe the movement of the second antennae, which are the l ...
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... They have a layer of fat beneath there skin which keeps the dolphin warm and stores food. It is also think that the blubber helps them to stay afloat, since it as lighter then water. have distant cautious that make them direct the other whales, most dolphin species have a distinct beck where as porpoises have a more rounded shape to there head. They also have a hooked-shaped dorsal fin not fend in other specious, as will as conical teeth. Erans explains that evolved from the Mesonychicsi, large land mammals and the earliest recognizable cetaceans lived about 50 million year ago. The earliest did not appear install the late mioceene period, Some 11 million years ...
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... neither gains nor loses altitude. When an airplane is stationary on the ramp, it is also in equilibrium, but the aerodynamic forces are not a factor. In calm wind conditions, the atmosphere exerts equal pressure on the upper and lower surfaces of the wing. Movement of air about the airplane, particularly the wing, is necessary before the aerodynamic force of lift becomes effective. During flight, however, pressures on the upper and lower surfaces of the wing are not the same. Although several factors contribute to this difference, the shape of the wing is the principal one. The wing is designed to divide the airflow into areas of high pressure below the wing and are ...
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... it to the Pacific Ocean. The Columbia is continuously cutting into the terrain that it flows through. Over millions of years water rushed through the Columbia Basin to form the Columbia River. Water carries soil, silt, and debris downstream. The constant movement of material in the river cuts and shapes the river basin into the land. This movement is a slow and inefficient use of energy. According to White, only two percent of water's potential energy results in the work of erosion. The other ninety-eight percent of water's energy was lost as water molecules rub against themselves, the river bed, and the river banks. This energy was released as heat into th ...
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... and deadly gas given off when any fuel is incompletely burned by, for example, a furnace or water heater (Marable 97). Unlike a fire where you can immediately see smoke and flames, carbon monoxide poisoning gives no physical evidence of its presence. But, when taught to see and look for the warning signs of carbon monoxide, deaths in the home due to carbon monoxide poisoning can be prevented. Sometimes, in a home the hot water supply is low, or the furnace fails to keep the house warm. A natural reaction in any of these situations would be to turn up the tempeture on both appliances. But, did you know that a low supply of hot water, and a furnace that doe ...
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... and Degenerative Diseases are diseases that go on for a long time or return from time to time over a long period. Usually they can not be cured but many can be helped by medical treatment. Chronic diseases are also degenerative. Such diseases gradually lead to the breakdown of tissues and organs of the body. is a Chronic Degenerative Disease. is the irreversible change in the normal liver tissue that results in the degeneration of functioning liver cells and their replacement with fibrous connective tissue. Cirrhosis can have a number of causes; the term is applied whenever the end result is scarring of the liver. The most common type of cirrhosis ...
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... and it would have severely negative economic impact on the industries. So the core issue becomes the fact no matter what, there will always be pollution, as long as these industries exist. So we should focus on how we can minimize this and yet at the same time have an efficient market system? Furthermore, we should also focus on how we can accomplish this so that sustainable growth and development can take place. So there is definitely a need for some form of government intervention to enforce and monitor this. Reason being that there is always an element of equality that has to be enforced, when dealing with cases such as this. For instance, larger c ...
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... acids. These in turn got hooked together to form simple proteins, the "building blocks" of life. At some point these proteins happened to get connected in just the right way, and a threshold was crossed: the proteins started reproducing themselves, and simple life was "born". During uncounted eons, this simple life gradually became more and more complex as chance modifications of the original proteins combined with external conditions of moisture, temperature, food supply, etc., to eventually produce all the varied and complex life forms inhabiting first the oceans, then the land, and finally the air, that we see today. Homo sapiens is seen as the topmost b ...
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... and how does it work?” What are they to do when a teacher assigns the students to send in all assignments by e-mail? Eventually, they will have to learn the basics of e-mail which, in turn, reveals even more problems with being computer illiterate. For an essay, the teacher requires that they go to the library to do research. The computer illiterate happily walks into the library to do their research. Imagine their surprise when they find out that the main tool of research is one of those darn computers. The poor illiterates stare blankly at a computer screen while the monotone library aide goes through a boring speech about how to use the computer. Bec ...
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