Doppler Effect The Doppler effect (or Doppler shift)‚ named after Austrian physicist Christian Doppler who proposed it in 1842‚ is the change in frequency of a wave for an observer moving relative to the source of the wave. It is commonly heard when a vehicle sounding a siren or horn approaches‚ passes‚ and recedes from an observer. The received frequency is higher (compared to the emitted frequency) during the approach‚ it is identical at the instant of passing by‚ and it is lower during the
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Bystander Apathy and Effect The bystander apathy‚ or bystander effect is a social psychological phenomenon that happens when somebody doesn’t offer help to a victim when other people are present. There is an inverse relationship between the number of bystanders and the probability of help. This implies that the likelihood of receiving help reduces with an increase in the number of bystanders. There are several explanations for the bystander effect. Although social psychologists have focused on two
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Lesson II – Effects of Deforestation Deforestation is the removal or destruction of large areas of forest or rainforest. Deforestation happens for many reasons‚ such as logging‚ agriculture‚ natural disasters‚ urbanization and mining. There are several ways to clear forest -- burning and clear-cutting the land are two methods. Although deforestation occurs worldwide‚ it’s a particularly critical issue in the Amazon rainforests of Brazil. There‚ the tropical forests‚ and the species of plants and
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pedestrians walk past the suffering man in such a location‚ they would lose their individual responsibility and tend to think that others present would take action. Hence‚ this social psychological phenomenon could be referred to as the bystander effect. Bystander effect was confirmed after the murder of Kitty Genovese in 1964. Kitty was raped and stabbed to death in two different attacks as she was on the way back home from her work. According to several media accounts‚ the assault lasted for nearly an hour
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Bystander Effect Our hypothesis was disproved in that the bystander effect made it less likely for strangers to help out. The bystander effect is defined as the following: the more people present when help is needed‚ the less likely any of them is provide assistance. At first glance‚ we assumed that it would be the opposite effect. We automatically were led to believe that there was a safety in number. However‚ while testing out our theory‚ the hypothesis turned out to be false. The more people
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Consequences of greenhouse-effect temperature rises Predicting the consequences of global warming is one of the most difficult tasks for the world’s climate researchers. This is because the natural processes that cause rain‚ hail and snow storms‚ increases in sea level and other expected effects of global warming are dependent on many different factors. It is also difficult to predict the size of the emissions of greenhouse gases in the coming decades‚ as this is determined to a great extent by
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One of the main premises in Nicholas Carr’s book “The Shallows: What the Internet is doing to our brains” is the Flynn effect. The Flynn effect refers to the steady increase in IQ scores the past century. People think the Flynn effect occurred because our technology advanced. The Flynn effect however was in motion before the internet became a mainstream‚ even before the world wars. Also because of the rapid increase in IQ scores the past century graphs show that the Fathers of America would have
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The Flynn effect is named after intelligence researcher James Flynn‚ an emeritus professor of the University of Otago in New Zealand. According to James Flynn‚ over the course of the last century‚ people who have taken IQ tests have gotten increasingly better scores – on average‚ three points better for every decade that has passed. Flynn knew that intelligence is partly inherited from our parents and partly the result of our environment and experiences‚ but improvement in test scores was happening
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This essay discusses the mpemba effect and how it works. The definition of the word Mpemba is basically a question where you ask can hot water freeze faster than cold water it can be used as a science fair experiment and to solve other scientific questions.The key aspect discussed in this annotated bibliography is what the mpemba effect is what the history of the experiment is and how it is exactly used that is what it is about. Can hot water freeze faster than cold water.I think that the temperature
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EFFECTS OF GLOBAL WARMING. The effects of global warming is the increase in the average temperature of Earth’s‚ grennhouse gases‚ aerosol ‚ and solar variation. The most common of average temperature on earth are temperatures increase more slowly than land temperatures because of the larger effective heat capacity of the oceans and because the ocean loses more heat by evaporation. Secondly‚ the effects of greenhouse is the process by which absorption and emission of infrared radiation by gases in
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