Bernoulli Principle
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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 surface of the wing is either pushed off or deflected in a way to cause turbulance.
So, what does lift and d .....
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Big Brother, Little Sister Computer Monitoring
.... at the University of Wisconsin-Madison explains that knowledge can be used as a weapon or as a tool (DeTienne 462).
For instance monitoring abuse can be found in the in the situation of airline agents. The agents discovered that by keeping customers on hold while finishing their work they could gain an extra 5-minute break (De Tienne 462). In the future these evasions of work will be stopped and for this reason "employee's who are accustomed to evading the monitoring system may no longer be ab .....
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Biological And Nuclear Weapons
.... today are about eight to forty times greater than the bomb detonated on Hiroshima. The Hiroshima blast killed between 70,000 to 100,000 people instantly. A biological agent can cause a similar amount of deaths; it all depends on how well the country is prepared to spot the spread of the germs, and how populated the area is.In third world nations, for example, the death toll could be greater because of the fact that they don't have the necessary medical equipment to stop the spread of germs and viruses.
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Biology, The Five Major Compounds
.... to guide cellular interactions. For many cells, sugars are the most important source of energy.
Lipids are important because they function as structural components of cell membranes, sources of insulation, and a mean of energy storage. The lipid molecules are most well known as forming basic structures of cell membranes and as energy storage molecules as well. In this group of lipids, there are about three main types: true fats (triglycerides), phospholipids, and steroids. True fats represe .....
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Black Holes 2
.... National Optical Astronomy Observatories said, " Black holes are very messy eaters. If you took that marble to an 'all-you-can-eat buffet' allowing it to consume all the matter around it, the feeding frenzy would produce as much radiation as the Sun." Research indicates that black holes may have existed at the beginning of time. Black holes are so dense that not even light can escape. Looking towards a black hole, the stars behind it would appear out of place because black holes distort light. The .....
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Blood Pressure
.... hypertension is that we know the causes of secondary hypertension. Usually, the causes of secondary hypertension include renal artery stenosis (or other cause of increased plasma renin), renal parenchymal disease (glomerulonephritis, diabetic nephropathy, polycystic disease, obstructive uropathy), drugs (oral contraceptives, steroids), and increased levels of catecholamines (pheochromocytoma), glucocorticoids (Cushing's disease), or mineralcorticoids.
Symptoms
Hypertension is referred to as .....
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Breast Cancer In Women
.... most commonly used tests used for detecting breast cancer among women today. The self exam is a simple exam that women can perform on their own with a few simple steps.
Another way of detecting breast cancer is with a mammography. This is an X-ray that scans in make up of the breast to show whether there are and tumors. This is the most effective type of detection to date. (Cancer Facts, Detection. National Cancer Institute) One disadvantage to using mammography is that with mammography, the .....
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Cancer 4
.... more rapidly than benign tissue and they invade normal tissue. Benign tissue is structured similar to normal tissue while malignant tissue is abnormal and has an unstructured appearance. Of greater importance, benign tissue does not metastasize, or begin to grow in other sites, like malignant tumors do. Cancer always refers to metastasized tumors but the term tumor is not always necessarily cancer. A tumor is any living tissue that is #1 distinguishable as abnormal living tissue.
After .....
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Causes Of Schizophreniz
.... results in abnormalities in brain development and maturation, a process that is ongoing during the first two decades of life. (6) The abnormalities are typically not focal but, rather, involve distributed neural circuits and neurotransmitter systems. When the connectivity and communication within neural circuitry are disrupted, patients have a variety of symptoms and impairments in cognition. Behind this diversity, however, is a final common pathway that defines the illness. For schizophrenia, it .....
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Celiac Sprue Disease
.... substance that damaged the intestine in certain individuals. Not until the 1950s were the characteristic microscopic changes in the lining of the intestine documented. The arrival of techniques to obtain biopsy specimens of the small intestine opened the floodgates of research activity, which taught us much of what we know today about this disease.
Most recently, research has been conducted that describes the immunologic mechanisms causing this type of intestinal injury. The vast majority of patients .....
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Cetaceans And Evolution
.... development. They contain no bone, and owe their firm and yet flexible shape to underlying fibrous elastic tissue. The body is enveloped in a thick layer of blubber that aids in bouyancy, helps to preserve body heat, and is a source of stored energy. A cetacean’s skin is free of sweat glands, oil glands, or hair, and feels much like smooth, wet rubber to the touch.
Cetaceans, like other mammals, have lungs. They breathe air through a single nostril, or pair of nostrils, located on the top of th .....
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Chacma Baboon
.... hunters because they have a keen sense of smell. A usual life span for a chacma baboon is 31 years.
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Chemical Warfare
.... can cause blinding tears and a lot of times, violent coughing. But the effects of the gas aren't too serious because they disappear within a few minutes, or even after a victim gets some fresh air.
In the 1950's and 1960's, police and military forces increased their use of non-lethal riot-control agents to control a lot of internal problems they had. The same agents were used also in the battlefields of Southeast Asia. The American and South Vietnamese military forces used them in 1965.
Another pla .....
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Chesapeake Bay Pollution
.... nutrients. The excess nutrients have created large blooms of microscopic plants called phytoplankton. The growth of phytoplankton has cut off the supply of light to underwater grasses. The underwater grasses are essential part of the Bay’s ecosystem because they provide a habitat for many species and help filter the water. Pollution has reduced the grasses to only 10% of their historic levels, from 600,000 acres to around 65,000 acres today. Another problem occurs when algae dies and begins to decompos .....
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Chicken Pox
.... get infected, badly
scratched or removed. A physician is not usually not needed to make a
diagnosis but after the symptoms appear it is still best to
make sure it is the chicken pox and not something much
worse. The physician can easily make a diagnosis by
checking the basic symptoms. Chicken pox is controlled by keeping the infected
person and anything the infected person has come in
contact with away from any people who have never
become infected. There is not really a treatment, just
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