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4 Ways to Prove the Earth Is Round

Compare shadows: Advertisement The first person to estimate the circumference of the Earth was a Greek mathematician named Eratosthenes, who was born in 276 B.C. He did so by comparing shadows case on the day of the summer solstice in what is today Aswan, Egypt, with the more northerly city of Alexandria. At noon, when the sun was directly overhead in Aswan, there were no shadows. In Alexandria, a stick set in the ground cast a shadow. Eratosthenes realized that if he knew the angle of the shadow and the distance between the cities, he could calculate the circumference of the globe. On a flat Earth, there wouldn't have been any difference between the length of the shadows at all. The sun's position would be the same, relative to the ground. Only a globe-shaped planet explains why the sun's position should be different in two cities a few hundred miles apart.                            Go climb a tree: This is another ...
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Chemical reaction and equation

  Chemical reactions -   The transformation of chemical substance into a new chemical substance by making and breaking of bonds between different atoms is known as Chemical Reaction.  Signs of a chemical reaction These factors denote that a chemical reaction has taken place- change of state of substance, change of color of substance,evolution of heat, absorption of heat, evolution of gas and evolution of light. Chemical Equation:   The representation of chemical reaction by means of symbols of substances in the form of formulae is called chemical equation.  E.g. - H 2  + O 2  ⇒ H 2 O                        Balanced Chemical Equation:   A balanced chemical equation has number atoms of each element equal on both left and right sides of the reaction.                                    *No...
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Meteorological Data Analysis

Is there any change due in weather to global warming in of Finland by using Data analytics                                       Effect of  global warming  “Has the Apparent temperature and humidity compared monthly across 10 years of the data indicate an increase due to Global warming” To find whether the average Apparent temperature for the month of a month say April starting from 2006 to 2016 and the average humidity for the same period have increased or not. step-1  Importing of libraries and Dataset.   import libraries step-2   over Look at the dataset. step-3 Cleaning the Dataset step-4 Plotting a graph of  the following Dataset >  Firstly  plot the  graph whole dataset for all months  Graph for all month >  Now    plot graph for a specific month(April) .   Graph for  month of April Conclusion: As we ca...
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