Water Rocket Lab Report Cindy Essays

Water Rocket Lab Report Cindy Essays Water Rocket Lab Report Cindy Paper Water Rocket Lab Report Cindy Paper We will measure the ranges,maximum altitudes and air time in order to have a better understanding of the projectile motion-As the practical situation which includes the air resistance and different kinds of errors caused by students carelessness s different from the theory,it is unavoidable that the results are quite different from the theoretic statistics. The horizontal velocity is related to the range, while the vertical velocity is related to the maximum altitude. This experiment can help us reinforce the concepts related to the motion in two dimensions although the water rocket does not have the ideal situation. A lot of equations we learned in class can help our group calculate the range and maximum altitude. Introduction Purpose: The purpose of the experiment was to reinforce the concepts related to motion n two dimensions using water rocket launches and the calculations necessary to determine launch speed and range. Background: (1) Because the water rockets are essentially pressurized chambers, they have the same launch speed, regardless of launch angle. (2) Ignoring air drag, a projectile will take the same time for its horizontal motion and its vertical motion. 2) Neglecting air drag, the horizontal velocity of a projectile will remain constant. (3) The vertical motion will have constant acceleration, g. Equations: R = box [ vertical motion] sys = vote + h g to horizontal motion] A hypothesis: The water rocket which is launched at different angles will fly into different heights in the sky and each time it will have different ranges when it drops. Method Materials The materials which ar e prepared to be used for this experiment are a timer, a water rocket, a meter ruler, a launch pad. Procedure Firstly,we need to set the rocket on the ground so that the barrel is exactly vertical. Then we can fire it vertically two or three times, using stopwatches to clock total air time,determining average air time for the vertical launch. Secondly,we are supposed to use the vertical motion equation to find the launch velocity, FL_, which, in this case only, is equal to boy. Thirdly,we need to calculate the horizontal and vertical components of the launch velocity for each of the 300, 45[], and 600 launches, and make a component vector diagram for each of the launch angles like the following diagram. FL = 30 m/s Ivy = sin 200 m/s 200 Example: Vs.. = coos 200 m/s As result,we can calculate the range, R, for launch at each angle. Elf you are willing to set a flag on the field at that distance from the rocket,you can do t. Finally,remember to measure the launch angle and secure the rocket barrel to fire at each of the angles just once, setting a flag where the rocket lands each time and measuring only the difference in range between the two flags to use in calculating percent error. Also remember to measure and record the air time for each launch. Results Important results in verbal form All of the useful lunch angles are 30 degree, 60 degree and 45 degree. The percentage errors of the data of angle Isis the Therefore, our group will mainly use the data of this angle. Calculated Range at 45 degree s 32. Mm. Vertical Displacement at 45 degree is calculated to be 15. 5 m. The measured time at 45 degree is 2. As. Discussion Discuss sources of error and calculate percentage errors on the three ranges, using the calculated range as the accepted value. Sources of errors: 1. The people who look at the protractor may be distracted by the objective factors, so the measured time is not accurate. 2. When students measure the range, it is difficult to have the right range as we cant measure in a straight line. 3. The water rocket may not be able to fall at the exact point on the land. It may leap because of the force. As a result, the range cannot be determined accurately. 4. The air resistance may hamper the flying of the water rocket. 5. Sometimes the water rocket may fly to the reverse direction. 6. Students may make a mistake when they write down the data . They may put the data in a wrong place. Launch angle(degrees) Percentage errors 30 27% 45 0. 3% 60 48. 9% Plot Calculated Range vs.. Launch Angle for all four launch angles. Examine: The range of the water rocket is the largest when the launch angle is 50 Meaning: When the launch angle is smaller than 450, the bigger the launch angle, the larger the range will be. If the launch angle is bigger than 450, the larger the launch angle, the smaller the range will be. Plot Vertical Displacement vs.. Time for one of the launch angles (except 900). Meaning: The vertical displacement is related to the time. As the time goes by, the water rocket will get higher when the initial velocity is invariable. Plot Horizontal Displacement vs.. Time: for one of the launch angles (except 900) Meaning: The horizontal displacement is related to the time. As the time goes by, the water rocket will go farther when the initial velocity is invariable. The water rocket has the largest horizontal displacement when the launch angle is 450. What effect do you think air drag had on your results? The air drag may shorten the range of the water rocket. The air drag will reduce the magnitude of velocity The air drag can change the direction of the water rocket and make it fall down immediately The ways that the experiment might be improved or varied. 1 . Students can use more advanced equipment to measure the air time and he range instead of using the protractor and the meter-ruler. 2. In the four experiments, we can control the pressure and the quantity of the water to remain the same. 3. Students can make a stream-line water rocket to reduce the air drag and make the stream easy to go through. 4. Students can use lighter materials to make the water rocket. 5. According to the physical theory, the water rocket can reach its largest range when it is launched at the 45 degree. However, during the experiment, we had better launch it at the angle between 45 and 55 o reach its largest range. 6. The top of the water rocket should be pointed so the air drag can be reduced. 7. In order to increase the stability of the water rocket, students can use the tripod as the launching pad. 8. To Increase the speed of the water rocket is to increase the amount of water per unit of time. Therefore, the pressure of the water inside the water rocket and the quantity of the water are appropriate for the largest range. Explanation of the results. These results show that our water rocket goes through a projectile motion, specially the one launched at 45 degree, because the percentage is only 0. 3%. Conclusion The air resistance and objective factors influence the examination of the theory of projectile motion. If these factors were eliminated, even though it is not possible, the results of the experiments can be more accurate and convincing. The experiments really make us understand that the range of the projectile in the motion in two dimensions is determined by the initial velocity and the air time. The horizontal velocity is related to the range, while the vertical velocity is related o the maximum altitude. This experiment can help us reinforce the concepts related to the motion in two dimensions although the water rocket does not have the ideal situation. The biggest success is that when the water rocket is launched at the 45 angle, the range is the biggest, which concurs with the theory. References http://item. Taboo. Com/item. Tm? Sum=al z. 2. 9. 194. Shedsid Douglas C. Conical: Chapter 2-3 PEP- pep Physics-principles with Applications for AP Group members: Fife, Ivy. Appendix A Table A The data of the experiment.

Geography of the Country of Belize - World Atlas

Geography of the Country of Belize - World Atlas Population: 314,522 (July 2010 estimate)Capital: BelmopanBordering Countries: Guatemala and MexicoLand Area: 8,867 square miles (22,966 sq km)Coastline: 320 miles (516 km)Highest Point: Doyles Delight at 3,805 feet (1,160 m)Belize is a country located in Central America and it is bordered to the north by Mexico, to the south and west by Guatemala and to the east by the Caribbean Sea. It is a diverse country with various cultures and languages. Belize also has the lowest population density in Central America with 35 people per square mile or 14 people per square kilometer. Belize is also known for its extreme biodiversity and distinctive ecosystems.History of BelizeThe first people to develop Belize were the Maya around 1500 B.C.E. As shown in archeological records, they established a number of settlements there. These include Caracol, Lamanai and Lubaantun. The first European contact with Belize occurred in 1502 when Christopher Columbus reached the areas coast. In 1638, the first Eu ropean settlement was established by England and for 150 years, many more English settlements were set up. In 1840, Belize became a Colony of British Honduras and in 1862, it became a crown colony. For one hundred years after that, Belize was a representative government of England but in January 1964, full self government with a ministerial system was granted. In 1973, the regions name was changed from British Honduras to Belize and on September 21, 1981, full independence was achieved.Government of BelizeToday, Belize is a parliamentary democracy within the British Commonwealth. It has an executive branch filled by Queen Elizabeth II as chief of state and a local head of government. Belize also has a bicameral National Assembly that is made up of the Senate and the House of Representatives. The Senate members are selected by appointment while the members of the House of Representatives are elected by direct popular votes every five years. Belizes judicial branch is comprised of the Summary Jurisdiction Courts, District Courts, the Supreme Court, Court of Appeal, the Privy Council in the U.K. and the Caribbean Court of Justice. Belize is divided into six districts (Belize, Cayo, Corozal, Orange Walk, Stann Creek and Toledo) for local administration.Economics and Land Use in BelizeTourism is the largest international revenue generator in Belize as its economy is very small and consists mainly of small private enterprises. Belize does export some agricultural products though - the largest of these include bananas, cacao, citrus, sugar, fish, cultured shrimp and lumber. The main industries in Belize are garment production, food processing, tourism, construction and oil. Tourism is large in Belize because it is a tropical, mainly undeveloped area with abundant recreation and Mayan historical sites. In addition, ecotourism is increasing in the country today.Geography, Climate and Biodiversity of BelizeBelize is a relatively small country with mainly flat terrain. On the coast it has a swampy coastal plain that is dominated by mangrove swamps and in the south and the interior there are hills and low mountains. Most of Belize is undeveloped and is forested with hardwoods. Belize is a part if the Mesoamerican biodiversity hotspot and it has many jungles, wildlife reserves, a large variety of different species of flora and fauna and the largest cave system in Central America. Some species of Belize include the black orchid, the mahogany tree, the toucan and tapirs.The climate of Belize is tropical and is therefore very hot and humid. It has a rainy season which lasts from May to November and a dry season lasting from February to May.More Facts about Belize Belize is the only country in Central America where English is the official language Regional languages of Belize are Kriol, Spanish, Garifuna, Maya and Plautdietsch Belize has one of the lowest population densities in the world The main religions in Belize are Roman Catholic, Anglican, Methodist, Mennonite, other Protestant, Muslim, Hindu and BuddhistTo learn more about Belize, visit the Belize section in Geography and Maps on this websit e. ReferencesCentral Intelligence Agency. (27 May 2010). CIA - The World Factbook - Belize. Retrieved from: https://www.cia.gov/library/publications/the-world-factbook/geos/bh.htmlInfoplease.com. (n.d.). Belize: History, Geography, Government, and Culture- Infoplease.com. Retrieved from: infoplease.com/ipa/A0107333.htmlUnited States Department of State. (9 April 2010). Belize. Retrieved from: state.gov/r/pa/ei/bgn/1955.htmWikipedia.com. (30 June 2010). Belize - Wikipedia, the Free Encyclopedia. Retrieved from: http://en.wikipedia.org/wiki/Belize