Chapter 1 Introduction 1.1 Problem It seems these days that everyone has a cellular phone. Whether yours is for business purposes or personal use‚ you need an efficient way of charging the battery in the phone. But‚ like most people‚ you probably don’t like being dependent on the main supply for charging your cell phone battery or you don’t have the time to recharge your cell phone battery. As technology has advanced and made our phones smaller and easier to use‚ we still have one of the original
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a detector around the body to detect any gamma rays or beta particles that pass out of the patient’s body. Nuclear radiation can damage cells. To avoid possible harm to the patient‚ it is important that medical tracers do not stay active in the body for long periods. III) The radioisotopes used have short half-lives so that they are quickly eliminated from the body‚ the radiation doses in such procedures are very low and the risks have been carefully examined. Reality TV! Even the word
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infrared light. Infrared absorption spectroscopy is the method which scientists use to determine the structures of molecules with the molecules’ characteristic absorption of infrared radiation. Infrared spectrum is molecular vibrational spectrum. When exposed to infrared radiation‚ sample molecules selectively absorb radiation of specific wavelengths which causes the change of dipole moment of sample molecules. Consequently‚ the vibrational energy levels of sample molecules transfer from ground state to
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References: 1. Campbell‚ N (1999) Biology‚ Benjamin-Cummings Publ. Co.‚ California [http://biology.clc.uc.edu/courses/bio104/photosyn.htm] 2. Davidson‚ S. (2007) Electromagnetic Radiation‚ Maricopia Education‚ New York‚ http://www.nationalelectrical.com/clncmpd.htm [13/03/2010] 3. Eates‚ P. J. (2004) Electromagnetic Spectrum‚ The Share Guide‚ Sydney‚ [http://www.lbl.gov/] 4. Farabee‚ M (2007) Photosynthesis and Light‚ Maricopia
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atmosphere. At the time of death of the organism‚ as a result of decay‚ the amount of radioactive isotope decreases‚ which allows archaeologists to examine the age of excavations. • Radioactivity in many countries is also used for food preservation. The radiation destroys microorganisms and inhibits decay‚ which in consequence prevents poisoning and extends product shelf-life. Fixed irradiated food still has the essential nutrients‚ while leaving it safe for health. • Radioactive methods have been applied
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Chemotherapy is the treatment of disease by the use of chemical substances‚ especially the treatment of cancer by cytotoxic and other drugs. Chemotherapy and radiation do not always fully cure cancer in the body. It separates cells in the body which affects hair‚ nails‚ skin‚ the digestive system‚ and the blood. This procedure makes you very ill and can cause lifelong damages to various parts of the body‚ including your brain‚ liver‚ hearing‚ and reproductive organs. Homeopathic cures are more effective
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antenna can be used for transmission and reception Radiation Patterns Radiation pattern o Graphical representation of radiation properties of an antenna o Depicted as two-dimensional cross section Beam width (or half-power beam width) o Measure of directivity of antenna o Angle within which power radiated is at least half of that in most preferred direction Reception pattern o Receiving antenna’s equivalent to radiation pattern Omnidirectional vs. directional antenna
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wavelengths of light that the spectrophotometer gives off (Meah‚2013). The level of light transmitted defines the amount of light absorbed‚ for instance‚ the lower the light absorbance the higher the amount of light transmitted. Ultraviolet (UV) light is radiation but the wavelength is shorter than visible light. A solution is a mixture of two or more substances. A stock solution is used to make a variety of other solutions which hold different concentrations; this is done via dilutions (Meah‚ 2013). Diluting
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Chapter 1 Key Terms; Name: Connor Newell Date: 8/8/11 Allergist- a physician who specializes in determining the substance to which an individual is allergic and who treats such allergies. Allergy-a condition in which and individual has a low tolerance of such things such as pollen‚ ragweed‚ dogs‚ cats and sometimes specific foods. American Red Cross-a national organization that certifies individuals in first aid and cardiopulmonary resuscitation procedures. It also sponsors other services such
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Everywhere I turn‚ I see someone on a cell phone‚ either talking or texting. Every car next to me in traffic has a GPS on the dashboard‚ including my own. It seems that everyone needs some help from technology on a daily basis. It both surrounds and intrigues us. Technology can be helpful‚ fun‚ and entertaining. Much of technology is created to assist with making projects faster or daily tasks more efficient. However‚ the collaboration of technologies in our lives has a few negative effects and I
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