in radar help to decide the range‚ angle‚ or speed of objects. Radio waves have the longest wavelength‚ smallest frequency‚ and the least energy of all electromagnetic waves. These waves are a type of electromagnetic radiation‚ which additionally include microwaves‚ infrared radiation‚ x-rays‚ and gamma rays. Other important uses of radio waves are for television‚ cellphones‚ and
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radioisotopes has increased our knowledge of biological processes and chemical reactions in humans and plants. New technologies: Geiger counter and Autoradiography. A Geiger counter is a type of particle detector that measures ionizing radiation. It is used as a handheld radiation survey instrument. Autoradiography is a technique used to trace the movements of certain substances around plants. The movement of the radioisotope can be traced by taking an autoradiograph. An autoradiograph is produced when
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gas held together by its own gravity in which the energy generated by nuclear reactions in the interior is balanced by the outflow of energy to the surface‚ and the inward-directed gravitational forces are balanced by the outward-directed gas and radiation pressures. Nova: A star that suddenly becomes much brighter and then gradually returns to its original brightness over a period of weeks to years. Supernova: A rare celestial phenomenon involving the explosion of most of the material in a star
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Nasal Cancers Tumors established within an individual’s nose can be either malignant (cancerous) or benign (non-cancerous). In all cases‚ those affected with nasal cancer frequently go through an advanced surgical procedure to confiscate the cancerous tissue/s. This is subsequently followed by a reconstructive rhinoplasty to help the person restore or improve the former shape of the nose. This is because nasal cancers often leave large defects in the nose. Proper reconstruction should aim not just
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of water and salts essential for normal body function‚ the free dictionary (2012). Dehydration occurs when the body loses more fluid then it takes in. This is very dangerous to the body. Dehydration cans results from a hot‚ dry climate; prolonged exposure to sun or high temperatures; not drinking enough or other medications that increase urination. Dehydration can upset the delicate fluid-salt balance needed to maintain healthy cells and tissues. According to free dictionary (2012)‚ Sub Heading
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reflection from the ionosphere. Sky waves: a radio wave that is reflected back to earth by the ionosphere or a communications satellite; permits transmission around the curve of the earth’s surface Line of propagation: is the electro-magnetic radiation or acoustic wave propagation. Electromagnetic transmission light travels in a straight line. The rays or waves can be diffracted‚ refracted‚ reflected‚ or absorbed by atmosphere and obstructions with material and generally cannot travel over the
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problem remained. There was one experiment conducted by Hertz‚ the photoelectric effect‚ which could not be explained by considering light to be a wave. Hertz observed that when certain metals are illuminated by light or other electromagnetic radiation‚ they lose electrons. Suppose we set up an electric circuit. In this circuit the negative terminal of a battery has been connected to a piece of sodium metal. The positive terminal of the battery is connected through a meter that measures electric
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Theoretical Physicist Adam Brown writes about the possibility‚ or as it turns out‚ the impossibility to mine energy from black holes. It is common knowledge that the Earth’s resources are being burned through at an alarming rate. This issue has lead to many people seeking other sources of energy. However‚ the article poses the question‚ what happens after humanity find the new form of energy and exhaust that? Some propose should the descendants of the human race seek help from the stars. Ironically
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Case study one discusses the current situation that a 27-year old male‚ Josh is going through. Three months ago‚ Josh was walking to meet his Fiancée for lunch one day when she was struck and killed by a car‚ right in front of his eyes. He was with her in the final moments that she was alive‚ and has recently quit his job. It has become too difficult for him to revisit the area in which his Fiancée was killed and now lives with his parents. Often he finds that he relives the scene of her death in
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all the light shown in the surfaces. They also radiate almost perfectly. The temperature of the black body object determine the distribution of colors or wavelengths in the admitted line. A good example of black body radiation is the heat inside a stove‚ electromagnetic radiation light and heat exist in a form of standing waves‚ waves like the vibration of a guitar string is attached in both ends. The ends of the standing waves do not move‚ the are attached to the side of the stove‚ and many waves
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