Renewable energy Essay Example | Topics and Well Written Essays - 1500 words - 1

Renewable energy - Essay Example newable energy sources is that the energy sources like natural gas, coal, and oil have no permanent reservoirs and they will be exhausted at some time in future. Therefore, the world has turned to renewable energy sources as alternatives to traditional sources of energy (Hick, n.d.). Renewable energy sources are some of the very beneficial energy sources for a country. Some of the most considerable advantages of renewable energy include sustainability, less maintenance requirement, reduced cost of operations, and increased economic benefits. These advantages also make renewable energy sources very critical for the economic stability of a country. These resources not only bring economic benefits, but also they put a very minimal impact on the environment because of generation of very little amount of waste products. No polluting emissions and repeated use without depletion are also two of the most considerable advantages of renewable energy. Apart from the advantages, there also exist some disadvantages of renewable energy. However, the number of disadvantages is very less as compared to the advantages. Some of the disadvantages include difficulty in generating electricity quantities equivalent to fossil fuel generated electricity and unreliability under certain conditions. Let us now discuss some of the widely used sources of renewable energy in order to get a clear picture of their advantages and disadvantages. There are six major types of renewable energy sources, which include hydropower energy source, wind energy source, solar energy source, geothermal energy source, biomass energy source, and nuclear power. Let us discuss all of them in some detail. Hydropower energy source is the most recent invention in renewable energy. Hydropower is the largest source of renewable energy, which has the generating capacity of 77,000 Megawatts (Conlan, 2009). It is due to the scarcity and rising prices of oil and gas that a large number of developed countries are putting

Spss assingment Speech or Presentation Example | Topics and Well Written Essays - 500 words

Spss assingment - Speech or Presentation Example raw score table above, it is evident that the use of calculator results into a very high mean score of 116.60 compared to without the use of no calculator. However, in calculator use, the standard deviation of the score is 7.1 compared to 5.1 without calculator. The amount of spread is higher on using a calculator. The t-test shows that, the score with and without a calculator is statistically different at 95% level of significance with a p = .000. in this case, the comparison of the means in the best test used since mean measures centrally the whole data. The mean of the scores in not special education is 106.60 with a standard deviation of 11.62 while that for special education is 106.70 with a standard deviation of 12.74. The mean difference is not statistically different at 95% level of significance and p = .986. This shows that, special education and not special education have got almost the same score level. The mean score for the recently traumatized is 32.15 with a standard deviation of 25.87. The not recently traumatized had a smaller mean of 31.80 with a standard deviation of 24.72. The mean is the best measure of central tendency used to determine the data distribution. The standard deviation on the other hand is the best in showing the data