Sunday, January 26, 2020
The Effect Of Increasing Mass On Acceleration Environmental Sciences Essay
The Effect Of Increasing Mass On Acceleration Environmental Sciences Essay Mass is a property of matter equal to the measure of an objects resistance to changes in either the speed or direction of its motion. The mass of an object is not dependent on gravity and therefore is different from but proportional to its weight. Speed is the time rate of change of position of a body without regard to direction. Linear speed is commonly measured in such units as meters per second, miles per hour, or feet per second. Velocity represents speed but according to the bodies direction. We can calculate from a distance time graph with dy/dx.  Acceleration describes the time rate the velocity is changing at. The relationship between acceleration and velocity is similar to the relationship between velocity and displacement. Acceleration is a vector quantity, so a = 0 for uniform velocity. The entity is thought to be uniformly accelerated if the constant of a is a non-zero. The average acceleration of an entity is defined as: Average acceleration = change in velocity / time taken In my investigation, I will aim to find the effect of increasing mass on acceleration. Method I will do this be setting up an apparatus which will measure the rate of acceleration. First, I will set up a height of 15cm and length of 227cm ramp. At this height, I do not have to apply a force to the trolley to accelerate the trolley because it will be able to slide down due to the force of gravity. This way, the force of gravity can be kept constant. Then, I will use a ticker machine and ticker tape to measure the rate of acceleration. I will stick the ticker tape into a trolley of 850g and let it fall. Each 10 mark on the ticker tape represents 0.2 seconds so I will cut the ticker tape in strips of 10 marks. By plotting the strips onto a graph, it would tell us the speed in which the trolley travelled. From this, we can calculate the acceleration of the trolley: Acceleration = final velocity initial velocity =  ₠¬Ã‚  „ v                                               Time                          t I used a ticker machine to calculate the rate of acceleration because it would show the rate in which acceleration changes. If we just timed how long it takes for the trolley to reach the end of the trolley, it would only give us the average acceleration. It would not be possible to measure the change in acceleration. I chose 15cm height ramp because from our preliminary results we found the marks on the ticker tape appeared most clearly at this height. Previously, the height of the ramp was 43cm and it was too high of the marks to appear clearly and because of this, my results werent as accurate. The average angle of the ramp was 3.87 ÃÅ'Ã… . I chose this angle because I found from preliminary results that if the angle is too high, the marks on the ticker tape would not print accurately. Before, the average angle was 10.7 ÃÅ'Ã… and we found it difficult to read the ticker tape. I clamped the ramp in place because this way, the height of the ramp is less prone to change so its acceleration will only be affected by the mass of the trolley. This will make our results more accurate. I added 400g of mass each time because from preliminary tests, I found that the ranges of the results were too close to each other to see a correlation when we added 100g each time. So to make the results more clear to see if mass affects acceleration, I decided to add more weights. This way, there would be a greater difference in the results and it would be clearer to distinguish a correlation. I chose a trolley of 850g because the trolley was light weight and the wheels were fairly smooth. Because it was light weight it would be easier to add mass on and be less affected by friction. Because the wheels were smooth, the frictional force would be less. This will make our results more accurate. To keep my investigation fair, I will only change one factor- the trolleys mass. I will keep everything else the same such as the height of the ramp and the ramp itself because these factors would affect the results if theyre are not kept the same. Prediction I predict that the mass of the trolley will not affect the rate of acceleration. This is because according to Galileos laws of motion, all bodies accelerate at the same rate regardless of their size or mass. For example, the fact that a feather falls slower than a steel ball is due to amount of air resistance that a feather experiences (a lot) versus a steel ball (very little). Also according to Newtons second law, the acceleration and gravitational force of a body is directly proportional to each other. He adds to Galileos law of motion by saying everything falls at the rate of 9.8m/s. He calculates this by: (F=force, m=mass of Earth (), a=acceleration, r=radius of Earth, G=gravitational constant (6.7-10†¾Ãƒ ¡Ã‚ ¶Ã‚ ¥Ãƒ ¡Ã‚ ¶Ã‚ ¥ Nm ²/kg ²), g=gravitational force) If F=ma and F=gm ma=gm So you can cancel m to get a=g Factors which affects the rate of acceleration: Friction would affect the rate of acceleration because it increases the reluctant force by griping on the wheels and increasing the time it takes for the wheels to turn. Sometimes this can be good because it makes cars easier to manoeuvre. To show that friction affects the acceleration, we could carry out the same experiment, but instead of changing the mass, we would add different materials to the ramp. This would show us how surface area affects acceleration. The gradient in which the body is travelling would also affect the acceleration because some of the force would go into the other direction instead of going down so it experiences more drag. This would increase the time it takes for the body to fall. We can show this in our experiment by increasing the angle of the ramp instead of mass. The shape of the body will also affect its acceleration because the more wide it is the more air resistance/ drag it will have. Air resistance slows down an object because it opposes a force in the opposite direct to gravity, so the force of gravity is less. We can show this by changing the size of the surface area of the trolley but keeping mass the same. Results Average Acceleration From the graph, we can see that generally, as the mass increases, so does the acceleration. Theres a steep linear gradient from 850g-1650g, and acceleration increased by 4.82ms†¾Ã‚ ². Even though the actual results shows a decrease in acceleration between 1650g-2100 by 0.53 ms†¾Ã‚ ², the line of best fit tells us it is actually increasing. Overall, acceleration increased by 0.2m/s†¾Ã‚ ² every 100g that was added. Average Speed The average speed shows as the mass increased, so does its speed. There is a linear gradient between 850g-1250, and the speed increased by 1.7cm/s. From 250g-2050g, the speed decreases by 0.75cm/s. However, from 2050g-2450g, the speed increases again by 0.66cm/s. Overall, although it decreases, the line of best fit shows that it increases greatly from 850g-1250, then the line starts levelling out from 1250g-1450g. Accuracy Rating To measure the accuracy rating, we drew a gradient line from our initial speed to our final speed in each set of data. If our results were accurate, the line should correspond with our results since the speed of the trolley should have been fairly constant. To calculate this, we counted the squares the tape was above the drawn line or below it. This would give us an estimation of how precise our results were. The accuracy rating generally shows that as the mass increases, the level of accuracy also increases. This graph shows the higher the number of accuracy, the lower the level of accuracy. There is a huge fall in the number of accuracy rating between 850g-2050. It went from 38.67 to 29, a difference of 9.67. From 850g-2050g, the number of accuracy kept decreasing and overall, it decreased by 14.3. However, from 2050g-2450g, it increased by 2. This may be because as mass increases, the bigger the friction is on the wheels. The larger the friction the better the wheels can grip on the surface so travels more accurately and is less likely to skid. This tells us, the results of acceleration and speed for 850g is very likely to be an outlier because the level of accuracy is very low. Comparison: When we compare the results of the average acceleration to its speed, we can see its directly proportional because as the acceleration increased, so did the speed. This is because acceleration shows how speed changes. When we compare the level of accuracy to the acceleration and speed, it tells us the results for 850g is very likely to be anomalie and possibly 1250g as well. If that were true, the graphs would show that there is no connection an objects mass to its acceleration. This would prove Galileos law of motion and Newtons second law that the rate of acceleration is constant and is not affected by size or mass. However, our experiment does prove their theories are correct because our experiment shows that the less resultant forces oppose to gravity (more friction in this case), the faster the body accelerates and does not depend on its mass. Evaluation I believe my experiment went fairly well because I felt I could justify the reasons why I obtained these results and although I have some anomalies, most of the results were fairly accurate. However, there were some flaws in my experiment such as: I found it hard to set off the trolley at the same position on the ramp each time because it was not marked clearly. I did not wipe/grease the ramp after each experiment, doing this would have make the friction of the ramp more consistent When I plotted the strips of ticker tape on the graph, I did not line them accurately on the squares. This made some of my results inaccurate. Improvements To improve my experiment, I would have made the height of the ramp lower because it would experience more friction for the wheels to grip on. I would have also used trolleys with different masses but the same density. This way, drag/air resistance be more likely to be the same so there would only be one factor affecting the results. This would make out results more accurate. To obtained accurate results, we can perform this experiment in a vacuum. This is because in a vacuum, you would not experience any resultant force as you do in Earth so you could accurately calculate acceleration. However, we can only experience a vacuum in space. In earth, to decrease resultant forces, we can carry out this experiment in: Under water High altitude Air tight conditions
Saturday, January 18, 2020
Natural America
The institution of marriage has been recognized in Western society for thousands of years. It is most widely recognized as a covenant of religious faith with the first writings referring to marriage occurring in the Bible. Marriage at that time represented a patriarchal family structure (Haeberle, 1981) and it served a distinct purpose – to propagate the human species by joining one man and one woman who were then expected to produce children from the union.Over time, the definition of marriage has changed and as a Western society we no longer think of marriage as a means to procreate. Instead, marriage has become a choice and a willing union between two partners as an expression of their love and commitment. Is the marriage of two same sex partners any less â€Å"natural†than that of their heterosexual counterparts?Going to back to biblical origins, marriage was expected of every single person and there were even cases where one husband enjoyed multiple wives and conc ubines. Marriage was important to keep the human species alive. It was also important for women, in particular, as they had little perceived value in society other than producing children who would keep the man’s family name living long into posterity. Over time, the laws of Israel changed to sanction only monogamy and discourage divorce (Haeberle, 1981).As history progressed, women continued to receive the short end of the stick, so to speak, in that females were not allowed to own property or businesses or be involved in government. The only option for a woman to receive any kind of benefits from society was to marry. Men also enjoyed benefits from marriage, most particularly he was often joined with a woman whose family brought wealth directly to him. Marriage was largely a business proposition up until the 20th century and usually did not take into account personal feelings or emotions.This type of traditional union between a man and woman has survived to the present day even though there is no longer any need to propagate our species or to manage a woman’s possessions or wealth. Instead, Western people are now focused on marrying for love and obtaining a loving partner (at least when marriage is for the right reasons!). But is there really a need for traditional marriage in today’s society? According to Haeberle, marriage survives because â€Å"it is a method for the orderly transmission and conservation of wealth and status†. It is a way to preserve our family lineage, and serves an economic purpose in allowing for inheritance and properties to be passed down to future generations of the same family, thereby keeping wealth confined to blood lines.Certainly a heterosexual union can accomplish these goals as well as receiving official sanction from the majority of religions. Society, as well, accepts and enforces traditional marriages and encourages a set of parents to produce children and cohabitate in a family home. These trad itional families engender faith, trust, and unconditional love and thus embody the core values of Western society.When two partners of the same sex wish to signify their attachment to each other by exchanging vows, their need for these same core values is no less than that of a heterosexual couple. Homosexual partners also marry for love and companionship, based on religious beliefs, often to raise children together, and with the idea that their possessions, wealth and property will be passed down and death benefits given to their life partner. Reverend Ed Evans (from Robinson, 2007) describes a same sex marriage ceremony he performed: â€Å"Then hugs. And kisses. Love was being expressed. Love that finally had found a tiny crack from which to shine.†The biggest difference between same sex and heterosexual couples is that society recognizes the latter type of union. Traditional marriage couples are afforded a legally sanctioned combination of their goods with clear inheritanc e laws as well as life and health insurance and death benefits. Homosexual couples are currently not allowed these privileges in all states of the United States except one, Massachusetts.Not only does our legal system not recognize a same sex union, but the majority of religions do not, either. â€Å"God has a plan for marriage and this isn’t it†according to Mildred Jeter and Richard Loving (from Robinson, 2007). And, from John Stott, who authored a book Same Sex Partnerships, his basis for denigrating such unions is supported by the bible by referring to â€Å"positive teaching in Genesis 1 and 2 about human sexuality and heterosexual marriage†(from Robinson, 2007).However, there are no passages in the Bible which clearly state a prohibition against same sex marriages, although it does condemn prostitution and rituals which involve homosexuality. Thus, â€Å"a religious liberal might thus conclude that gays and lesbians are called by God to either remain cel ibate or to enter into committed, loving, supported relationships  exactly the same lifestyles as God expects of heterosexuals†(Robinson, 2007).For both opponents and proponents in these examples, same sex marriage is not seen as â€Å"unnatural†but merely to be different than the institution we have been traditionally taught to believe is acceptable. Many other societies around the world do not prohibit, and even endorse, homosexual unions (Haeberle, 1981). By defining marriage as a union between two individuals who vow to lend each other their support and love, to create a life together, to work towards the same goals, to raise children (if such a decision is reached), and to share possessions, wealth and property, we can then remove the label of â€Å"same-sex†or â€Å"heterosexual†for it simply does not matter.Some may argue that the divorce rate will be affected by allowing same sex couples to marry in a legal union. â€Å"If marriage mea ns everything, it means absolutely nothing. It will mean nothing to same-sex as well as opposite-sex couples. The current decline of the institution of marriage will be accelerated. Increasing numbers of couples will elect to simply ‘live together’ †(Dobson, from Stanton). Current statistics show divorce rates hovering around 41 – 43% for all marriages; homosexual unions would actually have a higher rate of success if these couples were allowed to legally marry (Stanton, 2007).The United States we live in is a country founded on principles of exploration, the right to defend ourselves and to speak freely, and providing a haven for those who would risk persecution elsewhere. Should not these same principles apply to loving partners of the same sex who wish to marry? It is the civil right of every American citizen to be allowed the freedom to marry the person they love (Robinson, 2007). And, as American citizens, it is our duty to celebrate our differences a nd rejoice in the fact that family values are still alive and well, no matter the type of family.ReferencesHaeberle, Erwin J., Ph.D., Ed.D. (1981). History of Marriage in Western Civilization, The Sex Atlas. Continuum Publishing: New York. Retrieved September 11, 2007, from the Magnus Hirschfield Archive for Sexology Web site: http://www2.hu-berlin.de/sexology/ATLAS_EN/html/history_of_marriage_in_western.html.Haeberle, Erwin J., Ph.D., Ed.D. (1981). Marriage and the Family, The Sex Atlas. Continuum Publishing: New York. Retrieved September 11, 2007, from the Magnus Hirschfield Archive for Sexology Web site: http://www2.hu-berlin.de/sexology/ATLAS_EN/html/marriage_and_the_family.html.Robinson, B. A. (2007). Ontario Consultants on Religious Tolerance, Same-sex Marriages (SSM), civil unions and domestic partnerships. Retrieved September 11, 2007, from the Religious Tolerance Web site: http://www.religioustolerance.org/hom_marr.htm.Robinson, B. A. (2007). Ontario Consultants on Religiou s Tolerance, Liberal Christian views favoring Same-sex Marriages (SSM), civil unions and domestic partnerships. Retrieved September 11, 2007, from the Religious Tolerance Web site: http://www.religioustolerance.org/hom_marj_l.htm.Stanton, Glenn T. (2007). Do Half of All American Marriages Really End in Divorce?, from Focus on the Family. Retrieved September 11, 2007 from the Family.org Web site: http://www.family.org/socialissues/A000000596.cfm.
Thursday, January 9, 2020
The Secrets of 5 Paragraph Essay Samples for Middle School Revealed
The Secrets of 5 Paragraph Essay Samples for Middle School Revealed Writing a high school essay if you've got the tips about how to do essay effectively. An essay was defined in an assortment of means. It is one of the standard assignments used in most exams such as TOEFL, IELTS, and the SAT. If you know what things to expect and know how to compose a five paragraph essay, you'll be ready to tackle any essay writing prompt. Nowadays it's quite difficult to locate a trustworthy essay writing service. Seasoned writers truly don't arrive affordable, it really is that easy. After you inform us about all of the paper information, we'll begin searching for a proper writer for your paper. You should make sure that you select a topic which you find interesting and one that you'll want to write about. The topic also needs to be unique. For a student to take part in the western world of academics, it's essential they know the fundamentals of the 5-paragraph essay. Usually students aren't able to compose a nice 5 paragraph essay just because their tutors don't provide all the needed requirements and forget that students aren't professional writers. All teachers wish to see three or more credible sources in your paper. Writing is not only for those that are studying nor for your teachers. In the event you want to deal with the assignment by yourself, go on reading and learn to compose a 5 paragraph essay with no worries. If you discover that the writer did not provide just what you expected, request a revision, and we'll make the corrections. Understanding how to write a 5 paragraph essay is a good portion of any admission procedure, so should you wish to complete it correctly, get acquainted with samples online and follow our simple guidelines. Your final sentence should uphold your principal idea in a very c lear and compelling method. Make sure that every paragraph is related to the subject of your essay. Nowadays you own a body paragraph. Before discussing the conclusion you ought to consider the way that your body paragraphs will need to get built. The previous paragraph is going to be the final. A Startling Fact about 5 Paragraph Essay Samples for Middle School Uncovered You must find the correct resources for your essay along with patience when finding the proper inspiration to write. If do not have any idea how an excellent five-paragraph essay ought to be formatted, please have a peek at various examples posted online at no cost. If you're still searching for the efficient academic writing help to come up with a well-organized five-paragraph paper, know you will order a full writing solution online with no obstacles or risks. Tell our experts what kind of homework help on the internet you will need to get. Ok, I Think I Understand 5 Paragraph Essay Samples for Middle School, Now Tell Me About 5 Parag raph Essay Samples for Middle School! Nonetheless, camping is still a favourite pastime of people all over america. The shortage of healthy and tasty school lunch selections has just come to be a problem in nearly every elementary middle and higher school around the country. Finding 5 Paragraph Essay Samples for Middle School Online Given an essay is a lengthy bit of writing condensing into a 5 page structure is a powerful means to help it become comprehensive. In the procedure for reading, you will learn whether the ending of the five paragraph essayis in harmony with the introduction and the chief region of the work, whether there's anything important you could miss. You should be aware that the last part is your final chance to convince the reader of your reasoning, but don't incorporate any new ideas in the long run. The aim of the introduction is to place the problem which will be discussed correctly in your essay. It's called short essay in the feeling that the manner a certain topic is presented is congested but still focuses on the target of making the audience understand the entire point of the essay. The conclusion of essay, that is the previous part, should become your opportunity to produce your readers understand the entire point of your topic. You don't need to answer the question, because it's a rhetorical one. When you locate a topic interesting, you normally will realize that you are able to write the paper a great deal simpler.
Wednesday, January 1, 2020
Fais Gaffe French Phrase Explained
Expression: Fais gaffe !Pronunciation: FAY GAFFMeaning: Be careful! Watch out!Literal translation: Make mistake!Register: informalNotes: The French expression fais gaffe is interesting because it means just the opposite of its literal translation. Faire une gaffe means to make a mistake, to blunder, so you would think that be careful! would be something more like ne fais pas de gaffe! Apparently leaving out une is enough to turn the meaning around. You can also say Fais gaffe à toi to mean Watch yourself.ExampleÇa peut à ªtre dangereux: Fais gaffe!That can be dangerous: Be careful!
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