Doppler effect The Doppler effect‚ named after Christian Doppler‚ is the change in frequency and wavelength of a wave as perceived by an observer moving relative to the source of the waves. For waves that propagate in a wave medium‚ such as sound waves‚ the velocity of the observer and of the source are relative to the medium in which the waves are transmitted. The total Doppler effect may therefore result from motion of the source‚ motion of the observer‚ or motion of the medium. Each of these
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we hear and are caused by vibrations that travel through mediums. Depending on the medium and temperature‚ the time it takes for sound waves to travel vary. The hypothesis states that if the temperature in the air increases‚ then the speed of sound will also increase because faster-moving particles transfer energy quickly. The data collected supports the hypothesis. Therefore‚ increased air temperature affects the speed of sound because the molecules move faster‚ which causes the energy to be transferred
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spectrum of sunlight yields the highest temperature? My hypothesis is that the blue/violet part will have the highest temperature. The blue/violet part has the highest frequency out of all the colors on the visible light spectrum and it also has the highest amount of energy. Therefore‚ I hypothesize that it will have to the highest temperature as well. After conducting the experiment‚ I noticed that during the duration of five minutes‚ the temperatures of all four thermometers increased. The
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training are as follows: Ø The "halo effect" which as the name implies causes supervisors to only see the "angel" in an employee and blinds them by ignoring smaller problem areas that require growth and development. (San Joaquin County Human Resources Division‚ 2002) Ø The "comparing employees effect" evaluates one employee to another employee without considering the different tasks they are required to perform. (Neely‚ G.) Ø The "central tendency effect" is when supervisors rate their employees
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The goal of this experiment was to explore how temperature would influence the rate of cellular respiration of beans. It was hypothesized that as the temperature of the beans increased‚ the rate of cellular respiration would increase as well. In this experiment‚ the independent variable was the temperature‚ which gradually increased as time went by‚ and the dependent variable was the rate of cellular respiration‚ which was shown by the change in the amount of CO2 and O2 in the container. During the
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Practicing a sport is much more than the pure act of pushing your body through exhaustion or using your skills to reach your goals. There are many effects that show after you get involved in a sport. I am going to discuss some effects in this paper. The first major effect of practicing a sport is that you will develop physical abilities. Your body will be in better shape and you will be able to do things that you couldn’t physically do before. For example your speed‚ strength‚ stamina‚ lung capacity
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pollution can cause decreases in wildlife animal population‚ hurt the ecosystem‚ and threaten human health. But there are negative effects that are hard to ignore. Toxic pollution has been linked to cases of marine animals getting cancer‚ lesions‚ genetic and developmental defects‚ reproductive failures‚ sex changes‚ and death. Keep in mind that these are only the effects that humans are aware of. There very well could be other consequences that we just don’t know
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http://www.allsands.com/health/smokingeffects_srw_gn.htm Smoking’s Effects on the Lungs Smoking’s effects on the lungs‚ such as the development of emphysema and lung cancer‚ are mainly caused by tar and nicotine. Learn how smoking cigarettes causes immediate changes to occur in the lungs. One of the hardest habits to break is smoking cigarettes. Everyone knows it damages the lungs‚ causing emphysema and cancer. But do people know HOW these illnesses occur on a physiological level? Perhaps if the
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Butterfly Effect By: Aeia Being a child can be considered as the best stage of a person’s life. Why? Because‚ you can smile without worries‚ you can laugh without problems‚ and you can dream as like as fantasies that have no ending. However‚ how much would you like to stay being a child it’s still impossible. Like a caterpillar‚ they never stay being a caterpillar they get out on their cocoon and later spread their wings to become a beautiful butterfly. But along their metamorphosis‚ they
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What effects do mobile phones have on people’s health? November 2006 ABSTRACT This is a Health Evidence Network (HEN) synthesis report assessing the clinical effects of daily exposure to mobile phones in general populations. It addresses the impact on developing head and brain tumours‚ other morbidity-related outcomes and summarizes the biological effects of RF and microwave radiation. The report shows that the evidence available does not provide a clear pattern to support an association
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