Water Rockets An Investigational Experiment free essay sample

This report will investigate, design, perform and analyse an experiment on water rockets and explain how a water rocket reaches a maximum height using the concept of physics and experimental results. Hypothesis If the water level in the water rocket is increased, then the chances of obtaining the maximum height will also increase. This is because more thrust (force) is needed to make an object accelerate, and the greater the mass of an object, the greater the thrust it provides. Theory Statement The group will analyse and determine the amount of water needed to obtain the maximum height of the water rocket. Rocket motors generate a push or â€Å"thrust† by expelling a propellant out of the nozzle. The action is the movement of water out of the nozzle while the reaction is the forward motion of the rocket. The greater the â€Å"thrust†, the faster the rocket will accelerate. The other force that is acting on the rocket is the gravity; as the rocket goes up with the help of the thrust, the gravity pulls it down and brings the rocket back down to the ground. The group will use water because it is heavier and denser than air. More water molecules are packed into a given volume. Risk Assessment . Select a grassy field at least 30m wide. 2. Place the launcher in the centre of the field. 3. Observers should stand back several metres (approximately 10m). 4. The member responsible for pumping air in the rocket should wear eye protection. 5. The bottle rocket should be pumped at the maximum of 40 pressures per square inch (psi) and never above 40psi. 6. When pressurization is complete, everyone should stand back for about 10m for countdown. Two-litre bottles can weaken and explode. 7. Continue countdown and launch the rocket only when recovery range is clear. 8. If you do not experience lift off, call your teacher. (Remember that the rocket is pressurized and may blast off when you touch it. ) 9. Never stand over the rocket. Materials 2 empty 1. 5-litre soda bottle1 cardboard 1 launch pad 1 ruler 1 bicycle pump1 clinometer 1 rolls of duct tape1 beaker (600ml) A pair of scissorsa pair of safety glasses 1 bucket of water Setup Scenario Model Procedure Constructing the Model 1. An empty 1. 5litre soft drink bottle was cut in to half using a pair of scissors. 2. A nose cone was formed using the top of the halved bottle. 3. A nose cone was attached at the bottom f the other bottle. 4. Three cardboards were cut into a trapezium shape, after that the cardboard was wrapped with duct tape and was attached at the top of the other bottle to form a fin. Experiment: Launching the Water Rocket 1. A launch pad was set in the middle of a grassy field. 2. A water was filled in the water rocket (200ml, 400ml, 600ml) 3. A water bottle filled with water was car efully placed on the launch pad. 4. A bicycle pump was used to pump air inside the water bottle. (40psi) 5. A member of the group took hold of the rope which was attached to the launch pad and moved 10metres away. 6. Another member stood 30m away from the launch site to record the angle of the water rocket using a clinometer. 7. A member counted down till the launch was completed. 8. A member retrieved the water rocket. 9. The results were collated by a member. 10. The experiment was repeated twice on each of three different measurements of water. Controlled Variables * Amount of psi used in the water rocket * Shape of the fin/number of fins * Shape of the nose cone Data/Results Above eye level: Water Level (ml)| Trial 1| Trial 2| Average| | Angle( °)| Height(m)| Angle( °)| Height(m)| Angle( °)| Height(m)| 200ml| 20 °| 10. m| 30 °| 45m| 25 °| 28m| 400ml| 50 °| 35. 8m| 60 °| 52m| 55 °| 43. 9m| 600ml| 63 °| 58. 9m| 60 °| 52m| 61. 5 °| 55. 5m| Data Analysis Water Level (ml)| Average Height + Abi’s height| 200ml| 28. 7m | 400ml| 44. 6m| 600ml| 56. 2m| Discussion The water levels used were, 200 mL, 400mL and 600mL and two experiments were conducted with each water level. The maximum height obtained was 56. 2m with a water level of 600ml based on the results collected from the six experiments. With each water level, as the water level increased, the height of the rocket also increased with the help of the nose cone and fins attached to the rocket. Some modifications were used to improve the flight of the rocket. For example, fins were used in this experiment because they provide aerodynamic force stability for the bottle rocket; a nose cone was also added to reduce wind resistance which can prevent the water rocket from reaching its highest point. The maximum level of water (600ml) obtained the maximum height, because a bottle that is heavier has more Inertia, because it has more mass. More Inertia offers greater resistance to change in direction; which means that the wind will have less effect on a bottle with more Inertia. The data collected was reliable because of the repetition of the launch experiment with each water level. Possible errors could include: the clinometer – as the person who was taking the angle he/she cannot automatically detect the highest point because the rocket was moving; the way we put the bottle on the launch pad – as we put the bottle in the nozzle, it leaks which makes the water level decrease, which makes the experiment biased; the launcher – it was not stable, which can affect the progress of the rocket to get to its highest point; the fins – they were made of cardboard. The more they got wet, the heavier the bottle rocket is, which makes the weight of the rocket different in every experiment; the weather – it was a bit windy which made the flight a little difficult; and lastly, the repetitions of trials – the trials should have been done more than twice to increase accuracy. To improve this experiment, the group should have done the experiment on a less windy day; the group should have done a trial and error before doing the actual experiment to adjust some modifications. The group should also have used other various water levels to make the comparison more accurate. Conclusion In conclusion, this report has investigated, designed, performed and explained an investigational experiment of water rockets through the concept of physics and experimental results. The group conducted two experiments each; three different water levels and determined the maximum water level needed to obtain the highest maximum height. It was hypothesized that if the water level in the water rocket is increased, then the chances of obtaining the maximum height will increase. This is because the greater the mass of an object, more thrust (force) is needed to make the object accelerate. Based on the evidence and gathered results, the hypothesis was correct. This is because the more water that was put in the rocket the more force it provided for it to make it fly. The modifications, such as the fins and nose cone also helped the rocket to reach its highest point.

The Pitfall of Usa Essay Topics

The Pitfall of Usa Essay Topics Board members are going to have place to create announcements and bring up community problems. A community website offers information and details to residents and board members with a couple easy clicks 24 hours per day 7 days each week. Studying should consist of task of essay that argues a specific idea. Therefore, for your coursework, you are going to want to have the very best ideas. Writing prompts are among the best strategies to create confident writers who take pleasure in the approach. Turning to an expert essay writing service is frequently the most suitable choice, but just any essay writing service won't do. Understanding of the English language may lead to a thriving job and the employment prospects. Once you comprehend the form of essay, it's time to choose a topic. When you choose a topic, you should reply to the query and substantiate your response with three or more motivations as to why you think like that. After you have the topic, answer the question and support your answer with three or more explanations for why you believe it. There are a few great topics to look at when picking a topic for your argumentative essay. Education scholars are continuously evolving the way that they think about how we learn and what's taught. The role of assigning an essay to middle school students is to make awareness and permit them to develop writing skills. They will find it easier to write about topics that they are interested in, and it will make the researching process much simpler. Another reason is to observe how well students argue on various views and demonstrate understanding of the studied subject. It is crucial to choose a great topic as a way to compose a wonderful paper. Argumentative essay topics are so important since they are debatableand it's critical to at all times be critically considering the world around us. It's quite simple to think of an excellent essay topic on the US history when you have a notion of what is interesting for you. Recent argumentative essay topics that are related to society is going to do. School should happen in the evenings. Young writers may try simple on-line citation generators which are generally at no charge. Students must know they have a lot of chances to write away from the world of evaluations. There are lots of aspects about a sport which can be argued in an essay. Particular video games can be regarded as parts of art. Select a favourite sport and appear at how it developed. So you learned the value of teamwork, though you lost the huge game. Think of one school rule which you really dislike. Think of what you could do in order to make your school more beautiful. Think of one thing you're expected to learn in school that you don't think ought to be included in the curriculum. Year round school isn't a good idea. Training to compose essays on various topics is going to be the very best preparation to the exam. Life is much better than it was 50 decades ago. Many members of the world consider English among the main languages on earth with Mandarin, Spanish and French. Sunday Hope my blog can help you better your English. Teens should have to take parenting classes. They should be able to choose their bedtime. Children should be asked to read more. They watch too much television.

Topic Idea For A Research Paper On Ancient Rome

Topic Idea For A Research Paper On Ancient RomeIf you have ever been to Rome, you know that there is an abundance of history and culture in the city. You can also find many museums, palaces, and other historical sites. These have made up for the lack of education in many schools today.The problem is that students often tend to avoid studying the history of ancient Rome. The reasons for this are many. One reason is because it is a school subject. The other reason is that many teachers fear that their students will not take the time to learn more about this rich and interesting civilization.However, if you study the history of ancient Rome, you can find much to admire. The common people were actually very prosperous during this time. They were actually starting to create a larger and more civilized society, based on their new found skill with the use of iron. This iron was later known as 'Iron Roman'.There are many other examples of culture in ancient Rome. The scholars of ancient Rome were a highly developed society. People who lived in Roman society had even invented a way to move water and other objects easily. This advanced society was also very highly organized, which is another important factor to make this society so great.It has always been said, 'What is done today will be remembered in the future.' However, a lot of individuals choose to ignore what happened in the past when they feel that they will not remember it. While it is true that people will certainly remember how things were in the past, it is not important to remember every detail that occurred. It is however important to remember how things were in the past.An example of ancient Rome that can be found all over the world is that of the Coliseum. People have always wanted to see this monument in person. If you are studying ancient Rome, then you will not want to miss viewing this magnificent structure.There is no doubt that the Roman Empire was a tremendous influence in many aspects of the mode rn world. Studying ancient Rome has never been easier because of the Internet.

5 Great Newspapers For Students at Berkeley College

5 Great Newspapers For Students at Berkeley CollegeThe information you get from these five newspapers is the news that most students and faculty at Berkeley College receive. Students can choose between a free weekly print or online edition of the school newspaper. Other great news is found in the online editions of all five major papers.At this university located in the beautiful Bay Area, the students are proud to be one of the best accredited colleges in the nation. That is because there are so many excellent schools available. Students can attend a variety of types of schools including those offering online education, business and accounting programs, as well as technology courses. All students are encouraged to apply and choose a program that fits their interests and abilities.If you are interested in learning more about the University of California, and being a part of this incredible education experience, the Student Publications Office is an essential place to start. You can c ontact them by phone or visit their website to learn more about what you can expect. Student Publications Office is located in the Student Services Center on the third floor.Students at Berkeley College will find a wide variety of student publications that can be found on campus. This includes the Telegraph, which is a newspaper dedicated to students and the Berkeley community. The Telegraph's editor-in-chief is Eric Holmes, who has been with the newspaper for many years. He also provides advice for students on finding the perfect college, financial aid, and online resources for furthering their education.The Daily Californian is a college newspaper that is available at the Berkeley campus and other nearby campuses. It is a student publication that covers the state of California and the nation. The Daily Californian was published on the last Sunday of the month and is normally one page long.It is also a student publication that covers the campus news and activities at Berkeley Colle ge. With well over one thousand students enrolled at the college, it is interesting to see what student opinions and comments are included in the paper. Many students like to read these pieces so they can make informed decisions about which college to attend and their personal goals for their future.Students interested in the campus life can visit the Student News Service Website. This website provides the most up to date information regarding campus events, campus activities, and local events that are happening in the Berkeley area. If you are interested in visiting the campus, be sure to check out the Student Publications Office to help you with your education and career choice.

Get a Job at the USPS by Applying For Mail Room Jobs?

Get a Job at the USPS by Applying For Mail Room Jobs?Getting a job at the Postal Service is difficult. In fact, it may be so difficult that some applicants will apply for jobs in the mail room instead of the main post office location. But, there are also jobs within the post office - in the cataloging department, the customer service center, the financial services department, the processing center, and even the accounting department.To become a Postal Service employee, there are a few things you should know about applying for a job at the USPS, including APA sample research essay help. First, the APA does not simply have to teach you how to make a good resume. They can help you craft a compelling research essay to put together in order to persuade the interviewers to hire you.APA also provides you with sample research questions you can use to ensure that you prepare yourself well enough to come up with your own research essay. Each APA research essay helps you learn how to think like a postal worker and then, to do the research to back it up. With that background, it's much easier to come up with a research question and to answer it yourself so that you have more confidence when writing your essay.When it comes to researching a position within the mail room, you should always remember that the production staff are the ones in charge of getting your package to its destination or to whatever point your USPS package is supposed to be delivered to. So, be sure to begin with the research first and foremost. Once you get a little bit into the research, you will see how much of a stress reliever this type of research allows you to be.A lot of people assume that they should be the only applicants for mail rooms. They also assume that the only postal workers available are clerical workers or mailroom employees. Those assumptions are wrong and here's why:The staff members who run the post office facilities also make other important contributions to the operation of the p ostal system. As APA can show you, they are just as knowledgeable about the postal system as any other employee you will find on your resume and even more qualified.As long as you take advantage of APA's research, you can come up with an essay that not only shows you're a capable employee, but also shows you're creative and able to write. There's no better time than now to use APA help to help you create your resume and to give you the confidence to write a persuasive research essay. Do that and you'll be on your way to the next interview!

Home vs Dorm Essay Example

Home vs Dorm Essay Each year freshman students flock and migrate to a location where they could finally escape the stress of parents, siblings, and their own house and neighborhood. For some, the move was a total success, an enjoyment, and a new place to call home. For some though, the move was a struggle, and very un-enjoyable event. In this essay, I will compare and contrast in the views of living in a dorm vs. living at home. Living at home versus living in a dorm has its pros and cons. The ultimate freedom is finally upon you to a certain extent. You still depend on your parents to supply you with the everyday necessities and the occasional baked goodies to. The best thing is that living in the dorm your parents cannot reach you as they once could. The parents have to accept that you are growing into an adult and will show support in any way they can during your tenure at college. (College Dorm Life Vs Life, 2010) Living in a dorm is fun but it can get easily bored after the first few semester’s of staying there. It can also seem to get lonely when you are staying close by to anyone you know or grew up with. We will write a custom essay sample on Home vs Dorm specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Home vs Dorm specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Home vs Dorm specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Since you are living at the dorm now you have to handle stress that comes along to. The classes you are taking to just participating in activities on campus. You have to stay balance or you will start to mess up in class and out of class. One thing that draws us to living in a dorm is the freedom and experience. For example, if you have strict parents or have to abide by your parents rules at home then living in the dorm is priceless. Parents can be a huge bothersome at home when they become too intrusive in your life. Living at the dorm parents do not have the ability to pry open your life and invade your personal space. College Dorm Life Vs Life, 2010) There will be countless experience that you will see and participate on campus. You will be able to look back on your college experience and tell the famous stories you were part of. For example: the parties you went to, no curfew and no pressure from parents to study and no parental guidance. Living on your own as well will teach yo u how to live with yourself and survive to. You are totally on your own; so laundry calls will be in effect. You have to learn as well to balance your school work and keep your own room clean as well. At times living in the dorm can be overwhelming but the key to manage everything is time management. You go to John’s party down the hall, then you watch a movie in the recreation room, then you do your laundry, and finally it hits you that you have an assignment due the next morning. (College Dorm Room Vs Living At Home, 2009) There will be plenty of activities, hanging with friends, homework and chores to maintain. Before you know it the semester will be over and you have survived the first round in college. Living at home will save you tons of money. You won’t save a little bit of money; you will save a boat load of money. (College Dorm Room Vs Living At Home, 2009) You can eat and do laundry for free. You will be saving a lot in these two items alone. The distractions will be less as well compared to living in the dorm. Parents will not let you run wild if you were on your own. This will make it totally easier to focus on your school work. When your parents are 200 miles away you really don’t think too much about how they will react to that low midterm mark. Knowing your parents are just a few steps away makes you a bit more nervous about your grades. College Dorm Room Vs Living At Home, 2009) You will be more comfortable at home as well which is good and bad. When it is time for you to move from your parents house it may be hard to leave. The comfort and emotional attachment as well will be something to overcome. If financial circumstances dictate you starting college in your childhood bedroom, be sure to have fri ends who are dorm dwellers and have space on their floor to call your own on those late nights. (What are the advantages and disadvantages of commuting to college versus living in a dorm? 2010) At least you can still get a taste of the dorm live on campus as well.

A Wrinkle In Time1 essays

A Wrinkle In Time1 essays In Willstead town, in North Carolina strange things are happening. Do you want to know more? Well in A Wrinkle in Time by Madeleine LEngle, a wonderful writer tells all the weird things that are happening. The setting of this story is on North Carolina, at the town of Willstead in the year of 2005. One day Margaret was left by the Aliens when she was two- months old at planet Earth, and was found by the Murries, a nice couple, that had one year of marriage. Several years had passed and Margaret grew up like a normal girl. Now she has twin brothers and a Collie dog. At school everybody thinks that she is a freak, but she is a ten-year-old girl, with beautiful eyes and a lot of intelligence. She is an alien but no one knows not even her. Margaret came to Earth by a computer fraud that caused a wrinkle in time. An old woman called Mrs. Whatsit came to Earth with a job to take Margaret back. She visits Margaret and buys her nice things to win Margarets confidence. Mrs. Whatsit lived in the middle of the woods. One day a robbery had been reported to the police. It was a missing blanket and the thief was Mrs. Whatsit because she needed a lot of warmth because planet Earth was too cold for them. The Tesseract that is the name of the species that Margaret and Mrs. Whatsit belong to. At school some rare people that were the same species of Margaret went to do a contest. Margaret won the contest but this was no contest this were a series of exams that they had to do to Margaret to see if she could live in her home planet and see if she was fit to live there. Mrs. Whatsit was there and after the exams she sat down Margaret and started telling everything about her species and how she got here. At first Margaret didnt believe it but afterwards she started understanding all the things she had passed through all alone with no one that could understand her. Mrs. Wh ...