Sunlight and Concave Mirror for Cooking Researchers: Pamatmat‚ Mikaela Franchesca Siacon‚ Maria Sherlene Dianne Cruz‚ Jeremy Anne Lardizabal‚ Zaree Dominique Macagba‚ Danielle Martinez‚ Kyrene Teacher: Sir Vincent Sabong Abstract The researchers thought of trying to come up with a makeshift solar cooker in order to test if this way of cooking may be effective and useful in substituting for a frying pan and a stove. The solar cooker may be a possible alternative when cooking outdoors under
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wavelength and the frequency scale. The region of the spectrum are broadly classified into the following classes radio‚ microwave‚ infrared‚ ultraviolet‚ X-rays‚ and gamma rays. The term “radiation” means the emission of energy as electromagnetic waves or as moving subatomic particles. Gamma rays: used in cancer radiation treatments‚ come from radioactive material‚ also from supernova explosions. X-rays used in airports to look inside luggage‚ used for medical diagnostics‚ also created in stars (like
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High impact noises are particularly damaging. Noise can also mask out signals‚ affecting communication or danger warnings. Radiation hazards Equipment such as radioactive gauging devices or the radioactive trace element used in analytical chemistry produce Ionising radiation. Non-ionising radiation covers infrared radiation (heat-producing processes)‚ lasers‚ ultraviolet radiation (welding‚ sunlight)‚ and microwaves (high-frequency welders‚ freeze drying). Electrical hazards These include the risk
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radiochemistry in the field of medicine. Nuclear medicine is in the field of medicine by using imaging devices. Doctors use small amounts of radioactive materials called radio tracers that are either injected into the bloodstream‚ inhaled or swallowed. Radiation therapy is also a therapy that uses radioactive materials to treat cancers. The use of nuclear medicine is a fast-growing idea in the world of medicine. About 1/3 of modern procedures in hospitals use nuclear chemistry. Nuclear medicine technologist’s
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used in many things in today’s time such as TV remotes. A TV remote uses Infrared energy with the wavelength of 940 nanometers. You however cannot see this light emitting from the remote with the naked eye‚ but some telephones are sensitive to that radiation emitted. Another common use is an Infrared lamp or heat lamps which emit Infrared energy between 500 to 3000 nanometers. They are used to keep food warm or to heat bathrooms. They are also used to keep small animals and reptiles warm or even to
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Ionizing radiation is radiation that can damage DNA and increase the risk of cancer tremendously. This form of radiation involves high-energy photons being absorbed by the body and penetrating the DNA (8). MRI differs from this because it uses non-ionizing radiation in the form of magnetic fields and radio waves and this type of radiation has not been linked to cancer yet. However‚ it is notable that most non-ionizing radiation is heat and patients run the risk of burns
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| | Assignment 2 | | Subject: General ChemistryLecturer: Dr. Ajith H. Herath | | Name: Kavini de Silva | 4/5/’013 | | BOHR THEORY Introduction Niels Bohr applies quantum theory Rutherford’s Atomic Structure by assuming that electrons travel in stationary orbits defined by their angular momentum. This led to the calculation of possible energy levels for these orbits and the postulation that the emission of light occurs when an electron moves into a lower
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radio waves‚ microwaves‚ infrared waves‚ visible light‚ ultraviolet waves‚ x-rays and gamma rays. Each of these categories contains different type of waves‚ which varies in wavelength and photon energy‚ which is the units in which electromagnetic radiation come in. Figure 1. An Electromagnetic Spectrum shows the different wavelengths and photon energies of different electromagnetic waves. Source: http://www.lbl.gov/MicroWorlds/ALSTool/EMSpec/EMSpec2.html Figure 1. An Electromagnetic Spectrum shows
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Radioisotopes in Medicine Nuclear medicine uses radiation to provide diagnostic information about the functioning of a person’s specific organs‚ or to treat them. Diagnostic procedures are now routine. * Radiotherapy can be used to treat some medical conditions‚ especially cancer‚ using radiation to weaken or destroy particular targeted cells. * Tens of millions of nuclear medicine procedures are performed each year‚ and demand for radioisotopes is increasing rapidly. Nuclear Medicine
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that uses microwaves is radar. The radar uses microwave radiation to detect characteristics‚ range‚ speed of remote objects. Dangers That Have Been Reported: When injury from microwaves occur it usually results from insulated or stopped heating in the body. Exposure to microwave radiation can produce cataracts or clouding in the eye that destroys the passage of light and varies from slight to complete opacity. So exposure to microwave radiation can cause gradual blindness. One Scientist Associated
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