To see how long it takes the size of a hot object to cool down Essays

To see how long it takes the size of a hot object to cool down Essays To see how long it takes the size of a hot object to cool down Essay To see how long it takes the size of a hot object to cool down Essay Planning: I will make sure I devise a fair test by doing things correctly and fairly. The only variable I will be obtaining will be the temperature of the water at 80oc, and I will make sure it is fair by testing it with a thermometer. I will also make sure it is a fair test by adding more water into the bigger beakers because it wont all fit into the smaller ones so that will give the smaller beakers a fair chance as well, and I will measure the water in a measuring cylinder to make it fair.I will also make sure I devise a fair test by using a stopwatch to record the result every 30 seconds up to 2minutes, because it is more reliable and accurate. I will make sure it is fair when we record the results because when we get the temperature I will get a second opinion of my friend. I will also make sure my experiment is safe in all the possible ways I can. I will make sure we are safe by wearing rubber gloves just in case we spill some boiling water on our hands. Prediction: I predict that the bigger the beaker the faster it will cool, and the smaller the beaker the longer it will take to cool. I know this because of the Food Theory, the theory tells me that if there was a plate with a pile of hot food on it, it will take quite long for it to cool down, where as if you were to break that pile of hot food into smaller pieces of food then it will cool down much quicker because when you break it up you are giving it a bigger surface area so heat can escape around the sides, top and bottom. So therefore I think the same will happen with the beakers, but the bigger the beaker is obviously going to have a bigger surface area than the smaller beakers, where as in the theory the smaller food pieces have a bigger surface area than the pile of food, but that is because you cant break the beakers into pieces.Apparatus:* 4 different sized beakers* Water at 80oc* Kettle* Thermometer* Rubber Gloves* Stop watch* Pen Paper (for results)Method: First of all I got the equipment, which consists of 4 different sized beakers, a thermometer, a kettle, measuring cylinder and some water. Then I put the kettle on, when the water was boiled up to 80oc I measured it in the measuring cylinder and put the correct amount of water into the correct beaker, then we waited and every 30 seconds on the stop watch, we then measured the temperature of the water in the 4 beakers with a thermometer, then we recorded them on paper and plotted some graphs.Numbers and range: In total I will have 4 results for the 4 different sized beakers and for each beaker I will have two readings, and I will record the results every 30 seconds and at the end of all the results I will take away 2 minutes from 0 seconds for the first reading of the first beaker then I will do the same to the second reading for the first beaker then I will add them both and divide them by two which will give me an overall average for the first beaker, and I will carry that on for the next 3 be akers, in the end I should end up with 4 different averages with which I will plot a graph. Here are the 4 different beakers:BEAKER 1: The biggest with 150ml of waterBEAKER 2: The second biggest with 100ml of waterBEAKER 3: The third biggest with 75ml of waterBEAKER 4: The fourth biggest with 50ml of waterSafety: I will try and make my experiment safe by firstly wearing rubber gloves in case we spill the boiling water, secondly by consulting a teacher before and after we set up the experiment.CONCLUSIONCalculation: I calculated my averages by working out the difference between 2 minutes and 0 seconds for the first beaker and the first reading, then I did the first beaker and second reading, I then added the sums together and divided them by 2, to give me an average. I did this for the 3 other beakers as well. So I ended up with 4 overall averages.Pattern: I would say that a pattern did occur in both of my graphs, as you can see in the graphs labelled result 1 and result 2all the lin es go from a high temperature to a low one which shows that the temperatures did drop after some time, which was meant to happen, but then you see on graph result 1 the order from top to bottom is: beaker 1, beaker 4, beaker 2, beaker 3, which proves my prediction wrong about the bigger the beaker the faster it will cool, because beaker 4 is the smallest beaker and it cooled down faster than beaker 2 and 3, and also it starts off with beaker 1 which it should have, then it jumps straight to beaker4 which should be last, but then it carrys on as normal; beaker 2 and then beaker 3, so I think there was a problem within beaker 4. In the graph result 2 you can see the order from top to bottom is: beaker 3, beaker 1, beaker 2, beaker 4, so beaker 3 should be third but you can see that the rest is in order, so beaker 1, beaker 2, then it should have been beaker 3, then beaker 4, so I think there was a problem within beaker 3. In the graph labelled averages I think it all goes pear shaped, because the points are so far apart from each other, which made it harder for me to draw the line of best fit, you can also see the averages in order from highest temperature to lowest temperature is: beaker 2, beaker 4, beaker 1, beaker 3, so I think that because the averages have turned out like that and not how I expected which was beaker 1,2,3 and then 4, I think that the whole experiment must have went wrong from start to end.Evaluation: In my experiment I found that most of my results were quite off key, in the graphs result 1 and result 2 the orders were only one out of order. Then when it came to the graph labelled averages the order was completely wrong to what I predicted, I predicted the bigger the beaker the faster it will cool, if that happened the order would have been beaker 1, 2, 3, and then 4, but because it went wrong it turned out beaker 2, 4, 1 and then 3. if you look at the graph result 1 the problem was beaker 4, and in the graph result 2 the problem was beake r 3, I dont have a clue why those problems occurred, and by looking at the average I think I could have improved my experiment by doing it all over again but much more carefully this time round.

Famous Latin Americans in History

Famous Latin Americans in History The history of Latin America is packed full of influential people: dictators and statesmen, rebels and reformers, artists and entertainers. How to pick the ten most important? My criteria for compiling this list were that the person had to have made an important difference in his or her world, and had to have international importance. My ten most important, listed chronologically, are: Bartolomà © de Las Casas  (1484–1566) Although not actually born in Latin America, there can be no doubt about where his heart was. This Dominican friar fought for freedom and native rights in the early days of conquest and colonization, placing himself squarely in the way of those who would exploit and abuse the natives. If not for him, the horrors of the conquest would have been immeasurably worse.Simà ³n Bolà ­var  (1783–1830) The George Washington of South America led the way to freedom for millions of South Americans. His great charisma combined with military acumen made him the greatest of the different leaders of the Latin American Independence movement. He is responsible for the liberation of the present-day nations of Colombia, Venezuela, Ecuador, Peru, and Bolivia.Diego Rivera (1886–1957) Diego Rivera may not have been the only Mexican muralist, but he was certainly the most famous. Together with David Alfaro Siquieros and Josà © Clemente Orozco , they brought art out of the museums and into the streets, inviting international controversy at every turn. Augusto Pinochet  (1915–2006) Chiles dictator between 1974 and 1990, Pinochet was one of the leading figures in Operation Condor, an effort to intimidate and murder leftist opposition leaders. Operation Condor was a joint effort among Chile, Argentina, Paraguay, Uruguay, Bolivia and Brazil, all with the support of the United States Government.Fidel Castro  (1926–2016) The fiery revolutionary turned irascible statesman has had a profound effect on world politics for fifty years. A thorn in the side of American leaders since the Eisenhower administration, he has been a beacon of resistance for anti-imperialists.Roberto Gà ³mez Bolaà ±os (Chespirito, el Chavo del 8) (1929–2014) Not every Latin American youll ever meet will recognize the name Roberto Gà ³mez Bolaà ±os, but everyone from Mexico to Argentina will know el Chavo del 8, the fictional eight-year-old boy portrayed by Gà ³mez (whose stage name is Chespirito) for decades. Chespirito has worked in Tel evision for over 40 years, creating iconic series such as El Chavo del 8 and el Chapulà ­n Colorado (The Red Grasshopper).​ Gabriel Garcà ­a Mrquez (1927–2014) Gabriel Garcà ­a Mrquez did not invent Magical realism, that most Latin American of literary genres, but he perfected it. The winner of the 1982 Nobel Prize for Literature is Latin Americas most celebrated writer, and his works have been translated into dozens of languages and have sold millions of copies.Edison Arantes do Nascimento Pelà © (1940–) Brazils favorite son and arguably the best soccer player of all time, Pelà © later became famous for his tireless work on behalf of Brazils poor and downtrodden and as an ambassador for soccer. The universal admiration in which Brazilians hold him has also contributed to a decrease in racism in his home country.Pablo Escobar (1949–1993) The legendary drug lord of Medellà ­n, Colombia, was once considered by Forbes Magazine to be the seventh-richest man in the world. At the height of his power, he was the most powerful man in Colombia and his drug empire stretched around the worl d. In his rise to power, he was greatly aided by the support of Colombias poor, who viewed him as a sort of Robin Hood. Rigoberta Menchà º (1959–) A native of the rural province of Quichà ©, Guatemala, Rigoberta Menchà º and her family were involved in the bitter struggle for indigenous rights. She rose to prominence in 1982 when her autobiography was ghost-written by Elizabeth Burgos. Menchà º turned the resulting international attention into a platform for activism, and she was awarded the 1992 Nobel Peace Prize. She continues to be a world leader in native rights.