Cosmic Microwave Background Radiation The Big Bang theory predicts that the early universe was a very hot place and that as it expands‚ the gas within it cools. Thus the universe should be filled with radiation that is literally the remnant heat left over from the Big Bang‚ called the “cosmic microwave background radiation”‚ or CMB. The CMB is an almost-uniform background of radio waves that fill the universe. The CMB is‚ in effect‚ the leftover heat of the Big Bang itself - it was released when
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The Cosmic Microwave Background Radiation Perhaps the most conclusive (and certainly among the most carefully examined) piece of evidence for the Big Bang is the existence of an isotropic radiation bath that permeates the entire Universe known as the "cosmic microwave background" (CMB). The word "isotropic" means the same in all directions; the degree of anisotropy of the CMB is about one part in a thousand. In 1965‚ two young radio astronomers‚ Arno Penzias and Robert Wilson‚ almost accidentally
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get dragged back also. Falling through the event horizon is a bit like going over Niagara Falls in a canoe. If you are above the falls‚ you can get away if you paddle fast enough‚ but once you are over the edge‚ you are lost. There’s no way back. (Hawking‚
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TOPIC A STUDY ON STREET HAWKING IN ACCRA: AN EVALUATION OF ITS POLICIES INTRODUCTION “A hawker is a person who offers goods for sale to the public without making a permanent built-up structure from which to sell” (Aseidu‚ et al 2008). For a very long time the activities of street hawkers have become a major phenomenon in developing countries and this seems to be very much acute in African countries from which the capital of Ghana is no exception. It has been realized that‚ most of the populace
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understand why they patronise them and thereby discover the positive and negative aspects of hawking. This study would survey hawkers‚ as this would throw light on the type of problems the hawkers face. A mere assertion of the demands of hawkers for the right to work and the right to an existence is not enough to put forth their case at the national level. It is necessary to examine all factors associated with hawking as a profession. Only then could a clear idea on the problem emerge. This in turn can
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cheat small children and supply cheap and harmful eatables. Sometimes a hawker may turnout a child-lifter. Thousands and thousands of poor people earn their daily bread by hawking. It is a very useful self-employment which can be started with a very small amount of money. There is no harm in earning one’s bread and butter by hawking. Government should try to help them by giving loans on
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Cell Tower Radiation on Human Body Neha Kumar (Director‚ WILCOM Technologies Pvt. Ltd.) Prof. Girish Kumar (I.I.T Bombay) ISMOT- 2009 OBJECTIVE Radiation measurements near the cell towers EMF exposure Safety norms Review Biological effects (far below current standards) Radiation Shield (reduce Radiation levels) Electromagnetic Radiations Radiation emitted from Cell Phones‚ Cell phone towers‚ Wi-Fi‚ TV and FM towers‚ microwave ovens‚ etc are called Electromagnetic radiations and are known
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simulations show that a combined use of textiles with the right properties as a shield provides great possibilities for reduction of the RF effects over the human body. This can be proved from the results obtained at probe 1 which estimate the amount of RF radiation below the skin layer‚ are showing that the average SAR level with all kinds of shielding materials is ≥ 400 % lower than in the case without shielding (in the case with both shielding materials the reduction is > 300 times in the strength of the
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from hazard of x- radiation while they are working in wards or in the Radiology Department? Introduction This research is concerned with x-radiation protection for the pediatric staff nurses while they are taken care for pediatric patient in Salmaniya Medical Complex wards and as well as in radiology department. The authors are trying to learn how the staff is exposed x-radiation exposure‚ what the risks are and what are the best methods to protect themselves from x-radiation hazard? Staff
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When solid objects are heated‚ they emit radiation. At normal temperature‚ we are not aware of this radiation because the intensity is low. At higher temperatures‚ there is sufficient infrared radiation that we can feel the "heat" if we are close to them. At even higher temperature‚ the objects actually glow‚ like the heating element of toaster or red-hot electric stove burner. Since they are radiating energy‚ there must be a rate at which they are radiating. They may radiate 10 Joules per second
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