... with the same problem. You try to fly, but your wings are too heavy. You flap and flap but it is hopeless. Sinking to the bottom of the beautiful waters, you wonder what that sticky black killer was. It's simple. It's crude. It's oil. This scenario is nothing but a harsh reality that most people were unconcerned about until the disaster of the Exxon Valdez. The Valdez spill, tragically unnecessary though it was, has served as a laboratory for scientists, in which they can study the effects of oil pollution and experiment with new cleanup methods. It has also served as a costly lesson in the pitfalls of petroleum shipping and the shortcomings of emergency pla ...
... of the two types is the hydroelectric power plant. The main reason most countries use thermal versus the hydroelectric is because their countries don’t have enough concentrated water to create enough energy to generate electricity. (World Book vol. 14, 586) Nuclear power plants generate only about eleven percent of the world’s electricity. There are around 316 nuclear power plants in the world that create 213,000 megawatts of electricity. (INFOPEDIA) Radioactive, or nuclear, waste is the by-product of nuclear fission. Fission occurs when atoms’ nucleus’ split and cause a nuclear reaction. (General Information) When a free neu ...
... disorder . (Harvard, 1). Common are panic attacks (panic disorder), phobias, and general anxiety disorder (GAD). Panic attacks can begin with a feeling of intense terror followed by physical symptoms of anxiety. A panic attack is characterized by unpredictable attacks of severe anxiety with symptoms not related to any particular situation. (Hale, 1886). The person experiencing the attack may not be aware of the cause. Symptoms include four or more of the following: pounding heart, difficulty breathing, dizziness, chest pain, shaking, sweating, choking, nausea, depersonalization, numbness, fear of dying, flushes, fear of going crazy. Heredity, metabolic factors, ...
... life". And also many serious diseases appear in warm places. But not only is it that "warm temperatures can increase air and water pollution, which in turn harm human health" (ESP Health 1). The hot temperature, which could be the most direct effect of climate change, causes the heat problem. Because their cardiovascular system has to work harder to keep the body cool during hot weather. The temperature causes harmful effects to human health and another is cause of lung problem. "Higher air temperatures also increases the concentration of ozone at ground level". When this happens, the harmful ultraviolet radiation in the upper atmosphere reaches the earth's ...
... It is conceivable that we world citizens of the twentieth century are not the only living beings of our kind in the cosmos. Because no alienspar from another planet is on display in a museum for us to visit, the answer, "our earth is the only planet with human beings," still seems to be legitimate and convincing. But that is a very narrow-minded way to look at things. The idea that life can flourish only under terrestrial conditions has been made obsolete by research. It is a mistake to believe that life cannot exist without water and oxygen. Even on our own earth there are forms of life that need no oxygen. They are called anaerobic bacteria. A given ...
... precocity, this is when the Childs ovaries or testes still make steroids even without the release of GnRH. Since these children are still producing steroids without GnRH being released, low doses of Provera are not effective. For the body to produce steroid hormones it must convert cholesterol into estrogens and other related substances. In order for this process to take place, several steps are involved which are controlled by a certain enzyme. In knowing this, Lee wanted to find out if blocking the action of an enzyme would be reached with high doses of Provera. What Lee and Auchus found out was that Provera could inhibit certain enzymes, (3HSDII) which ...
... in many aspects of the earth's ecology. The first attempt would be to study the moon; the second, our neighbor planet. Unfortunately, our actual technology slightly provides strong, useful information about the red planet because of the vast distance between us. While people such as Steven Spielberg and George Lucas try to convince us with hundred million dollar movies that we are not alone, engineers and geologists like from the NASA-Stanford University team pursue, based on true evidence, the idea of possible life on Mars. However, the burden of proof is sometimes too heavy even based on real evidence. The tough debate started on August 1996, when sc ...
... shrub layer, and herbal layer. Trees can grow up to 3-5 feet in diameter and 80-100 feet tall. Animal life is abundant. There are fewer large animals but an absorbent amount of smaller animals. Animals such as raccoons, skunks, foxes, voles, and mice are very common in the deciduous forests. Amphibians are just as common such as frogs, toads, and salamanders. Threats to this biome are happening more frequently. Acid rain and air pollution is threatening plants and animals. Deer population has become a bigger threat over the last decade. Because the deer have not enough predators to the area, their size is over growing. Tree bark is being st ...
... 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 ...
... English researchers have came the closest by teasing frog body cells to develop into tadpoles. The tadpoles, however, never matured into frogs. The Scottish researchers have failed many times with sheep cells before their success, but the task was perfected and accomplished. Now this accomplishment has made it possible for the cloning of almost any mammal, including humans. To the average person, exactly how the technique works is unclear. Scientist predicted that by making cells dormant and bringing them close to death, something happens to break the chemical locks (barriers) that keep most of the genes inactive. The mammary cell is inserted into an unfert ...
