sliding. It is not used in practice because small area of contact surface results in high rate of wear at the edges due to which the transmission of motion may not be accurate as desired. B) Cylindrical cam with roller edge follower In this type of cam‚ the follower either reciprocates or oscillates in a plane parallel to the axis of the cam. In this a circumferential contour is cut in the surface of the cylinder‚ which rotates about its own axis. The follower rides in the groove of the cylinder
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Pollution Human beings have always caused some environmental pollution. Since prehistoric times‚ people have created waste. Like garbage today‚ this waste was either burned‚ tossed into waterways‚ buried‚ or dumped aboveground. However‚ the waste of early peoples was mostly food scraps and other substances that broke down easily by natural decay processes. Prehistoric populations were also much smaller and were spread out over large areas. As a result‚ pollution was less concentrated and caused
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Index Page Subtitle Pictures/ tables 2 What is pollution Pic 1 3-4 Water pollution Pic 2 5 Major water pollutants Table 20-1 6-7 Solutions Pic 3 8 Air pollution Pic4 Table 2 9 The green house effect Pic 4 10 Land pollution Pic 4 Pic 5 / table 3 11 Conclusion 12 References What is pollution? the contamination of air‚ water‚ or soil by substances that are harmful to living organisms. Pollution can occur naturally‚ for example through volcanic eruptions
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short term movement of people to destinations outside the place that they normally live or work‚ tourism doesn’t mean a person has to stay at the place‚ as it could be movement for all purposes‚ including day trip and excursions. There are three main types of tourism‚ which are inbound‚ outbound and domestic. • Inbound tourism – This is when a resident of a country travels oversea to visit the UK. The main example of this is someone coming in from the USA to visit the UK. • Outbound tourism – This refers
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Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of chemical substances or energy‚ such as noise‚ heat or light. Pollutants‚ the components of pollution‚ can be either foreign substances/energies or naturally occurring contaminants. Pollution is often classed as point source or nonpoint source pollution. There are 6 (six) types of pollution that are going to be discussed in this site‚ namely air‚ water‚ noise‚ land
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1. What type of performance is it? 2. Where and when is this performance occurring 3. Is it a scripted or non scripted performance? 4. Is it religious or secular in nature 5. Is its content authored‚ collective or improvised? 6. Are technologies used? How? 7. List a sequence of actions and discuss what the performers bodies do (dance rhythmic patterns etc.) 8. Is music used 9. Describe the space and or setting of the event (architecture and design/ public or private
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to face numerous serious problems associated with pollution. Pollution including air and water pollution may be defined as the result of human activities and natural factors has impacted on human health as well as environments (Wikipedia‚ 2010). This essay will discuss the rapid increasing pollution levels in the three cities of Bangkok‚ Bangladesh and Melbourne and analyze the approaches related to the strategies of government to alleviate pollution. It will then present the actions and cooperation
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WHAT IS ENVIRONMENT POLLUTION? The most appropriate definition of environmental pollution would be the introduction of different harmful pollutants into certain environment that make this environment unhealthy to live in. The most common pollutants are usually chemicals‚ garbage‚ and waste water. Environmental pollution is happening in many parts of the world‚ especially in form of air and water pollution. The best example for air pollution are some of China ’s cities‚ including capital Beijing
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Pollution This swan is breeding on a heap of plastic Littering on a beach in Guyana Pollution is when something is added to the environment that is harmful or poisonous to living things. Smoke in the air from factories is a type of pollution as it is bad for the lungs when breathed in. Sewage in drinking water is another type of pollution‚ as it can make people ill because it contains germs and viruses. People living next to a building site where there is too much noise can become sick as
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Pollution is the introduction of contaminants into the natural environment that cause adverse change.Pollution can take the form of chemical substances or energy‚ such as noise‚ heat or light. Pollutants‚ the components of pollution‚ can be either foreign substances/energies or naturally occurring contaminants. Pollution is often classed as point source or nonpoint source pollution. Pollution is nothing but "too much of something at wrong place" and environmental pollution is generally defined
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