... was successful in 1954 when he constructed what he called the maser (microwave amplification by stimulated emission of radiation). The maser amplifies the number of photons that cause microwaves. After the invention of the maser many scientists became interested in the idea of building an optical maser, which soon received the name laser (light amplification by stimulated emission of radiation). Townes paired with Arthur Schawlow, two Soviets, Nikolai Basov and Aleksander Prokhorov, as well as Gordon Gould were all interested in developing a light-amplifying device. All of them knew that there were three essential ingredients in making a laser; a florescent mater ...
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... camera. ROV's have been used for the last thirty years. They have been doing tasks that divers can't, do to Economical and safety reasons. A Submersible is a piece of machinery designed to do an underwater function. Submersible's and rov's are important to Marine biologists so they can study underwater creatures. Geologists can use them to find out more about the evolution of the Earth by studying the ocean floor. The ocean holds some minerals that are becoming scarce on the Earth's surface. If we can set up mining stations under the water it would also provide many jobs. Undersea manufacturing plants would be practical if located close to materials ...
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... most of the world's freshwater runoff encounters the oceans. Because fresh water is lighter, or less dense, than salt water, unless the two are mixed by the tides or winds, the fresh water remains at the surface, resulting in a salinity gradient. Tides force seawater inland as a countercurrent and produce a saltwater wedge below the freshwater surface waters (Bellamy 62). Estuaries are always in a state of change and hardly ever in a steady state. The principal energy source are tides, causing estuarine mixing, but wind, wave motions, and river runoff can also be important locally (Braun 45). Salt water and fresh water mix to form brackish water. The three main e ...
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... that is moving along the x-axis has a displacement function given by the following relation x = Acos(wt + f) where x is the position along the x axis A is the amplitude or in other words the maximum possible displacement w is the angular frequency and f is the phase constant or phase angle and has units of radians per second. The phase constant determines the position of the particle at time t = 0. The quantity (wt+ f) is called the phase. The above function x repeats itself whenever wt = n2p where n is an integer. The period T of the motion is the time it takes for the motion to complete one revolution or cycle. The unit for the period T is seconds. ...
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... that are simmilar to terrestrial basalts, the surface is even more weathered and rusted.The brighter areas seem to have similar but even more weatherd and rusted material that apparently contain more fine, dust-sized particles than they do the dark reigons. The mineral scapolite,which is rare on Earth,seem's wide spread; it may serve as a store for carbon dioxide in the atmosphere. Bright caps, apparntly made of frost or ice, mark the planet's polar regions . their seasonal cycle has been followed for almost two centuries .Each Martian autumn, bright clouds form over correct pole.Bellow what is called polar hood , a thin cap of carbon dioxide frost is let during au ...
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... tiger population has dropped from 40,000 to 1, 800 in the past ten years, and as few as 1 in every 10,000 tigers is white (www.cranes.org/whitetigers.com). are neither albinos nor a special species; they differ from the normally colored tigers by having blue eyes, a pink nose, and creamy white fur with black stripes. Tiger’s stripes are just like a human fingerprint, meaning that no two tigers have the same pattern of stripes. are not usually born from other . They get their color from double recessive allele. A Bengal tiger with two normal alleles or one normal or white allele is colored orange. Only a double dose of the mutant allele results in , and ...
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... 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 ...
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... that produces an enormous amount of energy. The problem is the nuclear waste that is produces. It is very radioactive and will not become stable for a very long time. Such a harmful substance is a great health concern and needs to be disposed of. Another problem is the energy it needs. It uses an element that is hard to find and which will eventually run out. Also, the reaction cannot be easily stopped and if it can't be stopped, a nuclear meltdown can occur. This is a serious environmental concern. Fusion is different. It is a process that combines two nuclei into one, releasing an amount of energy that is far greater than that of fission. In a common type ...
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... the body's billions of cells. But people who have either don't produce insulin or can't efficiently use the insulin they produce. Without insulin, they can't move glucose into the cells. Glucose accumulates in the blood, a condition called hyperglycemia ("hyper" = too much, "glycemia" = glucose in the blood). Hyperglycemia causes intense thirst, the need to urinate frequently, blurred vision, fatigue, and other symptoms. Over time, high blood glucose can cause very serious medical problems. Adding up the total toll of complications, the disease is one of the nation's leading causes of death. All complications can be largely prevented by practicing what is kno ...
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... Before Weight After Mass of Test tube + KClO4 41.5g 39.8g Mass of Test tube 37.5g 37.5 Mass of KClO4 4.0g 2.3g 2. Set up the apparatus shown below. 3. Gently heat the test tube containing the potassium perchlorate. Gas should begin to collect in the collection bottle. Record all observation. 4. Once the reaction is complete, no more gas give off, allow the test tube to cool. While the test tube is cooling test the gas in the collection bottle with glowing splint. Caution: Do not leave the rubber tubing down in the water trough during cooling or you will experience back-up. 5. After the test tube has cooled weigh it on a balance. What is the change in mas ...
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