Physics IA bouncing ball Essay Example

Physics IA bouncing ball Paper 1. Put the ruler perpendicular to the flat surface.  2. Place the ruler in the arm of the metal stand and secure it tight so that the ruler can stay still; it must be perpendicular to the surface and parallel to the stand.  3. Grab the rubber ball and place it with one hand besides the 10cm mark in the ruler.  4. With the other hand have the chronometer in 0 seconds and be ready because as you are going to release the ball you have to start the count in the chronometer.  5. Drop the ball and start the count in the chronometer simultaneously. 6. Wait until the ball to stop bouncing completely, this is, wait for the ball to start rolling so that you can see movement just in the horizontal way or x-axis and not in the vertical way or y-axis, and in that specific time, stop the count.  7. In your physics lab table write the resultant time t for the height h of 10cm.  8. Repeat steps 3-6 twice and write the multiple resultant times in your physics lab table in order to have three time samples. This is for avoiding random errors.  9. Continue the pattern of releasing the ball from each multiple of 10 until reaching 100cm, measuring three times from each multiple of 10cm. Write the results in your physics lab table. We will write a custom essay sample on Physics IA bouncing ball specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Physics IA bouncing ball specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Physics IA bouncing ball specifically for you FOR ONLY $16.38 $13.9/page Hire Writer 10. Calculate the average of the three times you measure for each multiple of 10cm to 100cm by using this formula:  Taverage= (T1+T2+T3)/3  and write it in your physics lab table in an extra column.  For more accurate results:  -Do not move the experiment while taking your measurements. If you change the place of the experiment, the surface texture, evenness, or slope may change as well, making the results less accurate.  -Use the SAME ball throughout all the experiment; each ball has in general the same characteristics, except that they usually are not perfectly round and they have different sizes and masses. By using the same ball you are increasing accuracy in your measurements. Uncerntanties The uncertainty of the dependant variable, which is the time t, is 0.35 s. This has been measured by subtracting the smallest value to the greatest value of time in every measurement of the height, and then the result of that was divided by 2. It can be better explained with this equation:  After that, the greatest difference of all the results is going to be the one that is chosen to be the uncertainty of time in every measure of height. In this experiment the greatest difference was found in the value of height 80cm, which was 0.35 because. Therefore, 3.5 is going to be the uncertainty of time. All values of time have been rounded to 0.10cm.  The uncertainty of the independent variable, which is the height h, is 0.1cm. This has been settled without any formal guidelines; the factor that just the human eye is used for this experiment and no other more accurate mechanism, gives an uncertainty because the human being is not perfect when measuring something. In this case, the hand can shake at the point of the ruler, or just the perspective of the experimenter can create some error coefficient when measuring the height using a ruler. All values of height have been rounded to 0.1cm.  The following graph was made with Logger Pro Software. I included the uncertainty bars and the computer generated the best straight line and determined the gradient.  Now, the graph is repeated with maximum and minimum gradients based on the extremes of the first and last data point uncertainty bars. Conclusion and Evaluation In Figure 1.3, which is the first graph of our results, there seems to be a direct relationship between the increase of time and the increase of height in the experiment. The straight line that the computer generated shows an increase in both x and y axes which represent the height and the time, respectively.  I can conclude by saying that the experiment of releasing a ball at certain heights, that in this case they were from 10cm in multiples of 10 till reaching a meter, and measuring multiple times to get an average, that in this case was measuring 3 times per measure of height the time it took for the ball to stop bouncing completely and then making a average time, that the hypothesis of height being proportional to time was right and has been proved by analyzing the results and graphs. Time t and the height h were proportional to each other because in the result graph we find a straight line with a slope that proves that proportionality. This makes the experiment successful because the objective of proving the hypothesis was achieved.  After analyzing these factors, the answer to the question How does altering the height when releasing a bouncing rubber ball affect the time until its complete rest in the vertical sense or y-axis? is that as the height increases where the ball is released, it is going to take more time until its rest in the vertical sense, and in the other hand, as the height decreases, the ball is going to take less time to stop bouncing. Problems and Improvement Originally, the experiment was meant to measure the time until the ball reached complete rest (in both x and y axes) so that it could be easy to stop the chronometer and be more accurate. The problem was that the ball would roll on the floor, and as the floor is an even texture, the ball would stop completely taking a lot of time doing it, and sometimes the time it would take to stop in some cases would be very different to other cases because the ball rolls in different directions every time. Changing the experiment of measuring the time until the ball achieved complete rest to measuring time till the ball achieved complete rest in the vertical sense or the y-axis was the solution to overcome this problem. It created a minor problem though. The problem is that the eye cant really see when the ball stops bouncing completely because there are some bounces in the y-axis that cannot be seen by the human eye because they are really minor, making the stopping of the chronometer count a little subjective and decreasing the accuracy of the experiment.

European Union Essays - Eurozone, Economy Of The European Union

European Union Essays - Eurozone, Economy Of The European Union European Union In 1967, three European institutions merged. The three institutions were the European Coal and Steel Community (ECSC), the European Economic Community (EEC), and the European Atomic Energy Community (Euratom). When the three merged, they formed the European Community or EC. On November 1, 1993, the 12 members of the European Community ratified the Treaty on European Union, or Maastricht Treaty. The twelve members were- Belgium, Denmark, France, Germany, Great Britain, Greece, Ireland, Italy, Luxembourg, the Netherlands, Portugal, and Spain. The countries of the Benelux Economic Union- Belgium, the Netherlands, and Luxembourg- continue to and in some ways as a single economic entity within the European Union. The EC became the policy-making body of the European Union. In 1994 Austria, Finland, and Sweden became members of the European Union. By 1997 more than a dozen countries had applied for European Union membership, but the European Union had only admitted the three listed above. The other countries that applied for membership include Turkey, Cyprus, Malta, Switzerland, Hungary, Poland, Romania, Slovakia, Latvia, Estonia, Lithuania, Bulgaria, and the Czech Republic. Of those countries, six are considered associate members of the European Union: Bulgaria, Czech Republic, Hungary, Poland, Romania, and Slovakia. Three other countries-Estonia, Latvia, and Lithuania-are being considered for associate membership. Other potential European Union applicants include members of the European Free Trade Association. The European Union was expected to decide which counties it would open negotiations for full membership with by the end of 1997. The purpose of the European Union was to increase economic integration and strengthen cooperation among its member states. European citizenship was granted to citizens of each member state, under the Treaty on European Union. Customs and immigration agreements were enhanced to allow European citizens more freedom to live, work, and study in any of the member states, and border controls were also eased. The European Union also set a goal of establishing a single European currency, the Euro, by 1997; this date was later changed to 1999. It is proposed that full circulation of the Euro is to be in effect by the year 2002. At that time the individual states notes will no longer be valid. The European Union?s attempts to establish a single European currency have had some controversy. An example is, some member countries, such as Great Britain, have worried that a shared European currency would threaten their national identity and their government?s authority. On the other hand, some of the other European Union member countries have been struggling to meet the economic requirements for participating in a common currency. To meet the requirements, which include a budget deficit of no more than three percent of their gross domestic product, by the deadline of late 1997. To meet the requirements some countries have imposed budget cuts and new taxes. Some of the measures taken by these countries have faced some resistance. The people who will mainly benefit from the common currency are the European citizens. The overall benefit that the euro will bring is a stable economic environment that will lead to low inflation and low interest rates. There are three main areas that the member states will gain savings from, they include, reduced losses created by currency exchanges, lower costs created by better competition in the euro zone, and a more favorable trading and investment environment for local businesses. The reduction of losses due to the elimination of currency exchanges within the euro zone will produce almost a whole percentage point of annual European Union GDP every year. The use of a common currency will allow easier price comparisons in the member states. By eliminating the currency exchange risk, economic and monetary union will bring more business and trading potential to commercial companies, especially small and medium-sized businesses. Large European companies will have a reduction in a l ot of their costs, mainly in the processes of foreign exchange transactions. Consumers will benefit greatly from the common currency. Some of the benefits include: reduced costs for traveling to other countries; easier and less expensive transfer of funds to other countries; increased competition between businesses, which will lead to lower prices; low interest rates; and more economic growth, which will lead to increased job security. The European

Mafia politics in italy Essay Example | Topics and Well Written Essays - 500 words

Mafia politics in italy - Essay Example They manage to control entire markets and take a cut of every part of the operation. They buy off police officers, prosecutors, and judges, and continue to leach from the economy. As one boss once described Mafia operations in Sicily: â€Å"Mafia organizations entirely control the building sector in Palermo – the quarries where aggregates are mined, site clearance firms, cement plants, metal depots for the construction industry, wholesalers for sanitary fixtures, and so on.†3 Often, in order to generate the maximum amount of revenues, the mafia will use â€Å"fronts organizations†Ã¢â‚¬â€legitimate business ventures that are developed in order to hide illegal activities.4 It is not hard to see, based on this information, why the mafia must be rooted out and destroyed. They undermine the rule of law. We need politicians who are strong enough to stand up to these people who are willing to do anything and buy anyone in order to stay in power. They must be stopped. I n some countries, the problem of the mafia is taken very seriously. In the United States, the Kefauver Committee in the 1950s travelled around the country and sought to inform citizens about the numerous problems caused by the mafia and by mafia politics.5 Actions in the U.S.