Natural Science Essay

The relevance of this test question is to determine which brand of leading paper towels is the best most absorbent. Consumers want to use the product that is most effective at meeting their needs. A more expensive product may actually be more cost effective if you can use less of it than a brand that costs less. Literature Review Many experiments have been conducted to test the strength and absorbency of paper towels. While the steps of the experiment vary from test to test, all of experiments are testing the same two factors; how much water can each paper towel brand absorb and how strong are each of the paper towels. Below I have reviewed the process and results from three experiments that are similar to the one I will be using. In the first experiment, the tester uses five brands of paper towels to test for absorbency, using paper towels of the same size to ensure the accuracy of the results. He draws a two inch circle in the center of a sheet of paper towel from each brand represented and placing the paper towel in an embroidery hoop to maintain stability. He then drops fifteen drops of water into the center of the circle draw on the paper towel, repeating the process for each brand, and measures the amount of time it takes the paper towel to wick the moisture outside of the circle. This test concludes that Bounty has the greatest absorbency. The next experiment tests for both absorbency and strength. As in the first test, several different brands of paper towels were used. In this experiment, to test the absorbency, the tester takes a sheet of each of the towels an inserts it into a glass with two ounces of water and leaves each sit for twenty seconds. After the twenty seconds expired, the tester removed the paper towel from the glass and rang out each paper towel into a measuring cup to see how much water each towel had absorbed. The second part of the experiment is conducted by stretching sheets of each paper towel through an embroidery hoop, placing 25 pennies in the center of the paper towel, and adding water to the towel drop by drop until the pennies fall through. The strongest paper towel in this test was Brawny Brand. The final experiment that I reviewed also tested for absorbency. The theory behind this experiment was the faster that water moves through the towel, the more absorbent it is. The experimenter cut strips from each paper towel, one inch wide and six inches long. A mark is drawn on each paper towel one inch from the end using a waterproof marker. The strip is then held in a glass of water with the bottom inch submerged, timing how long it takes for the water to travel the length of the strip. The process is then repeated for each brand that is being tested. The most absorbent brand in this test was Brawny. Experimental Design A. Steps in Experimental Procedure The absorbency of the towels will be tested by the speed the water moves through the paper towels, the faster the water moves, the more absorbent the towel is. I will be using the following brands of paper towels in my experiment: Brawny, Bounty, Sparkle and Scott. Other supplies necessary to complete the experiment are: a waterproof marker, and a sixteen-ounce glass of water, and a timer that registers tenths of a second. 1. Prepare three samples of paper towel from each brand by cutting strips of each that is 2 inches wide and six inches long. 2. Using a water-proof marker, draw a line across each paper towel one inch from the bottom. 3. Fill a sixteen ounce glass with water and prepare timer. 4. Take the first strip of paper towel and submerge it up to the line in the glass of water while holding it vertical to the glass while starting the timer. 5. Allow the timer to run until the water is absorbed through the paper towel and reaches the end of the towel not submerged. 6. Stop the timer and record the time in tenths of seconds. 7. Repeat steps 4 through 6 for all three strips of each brand. B. Reasoning for Choosing my Experimental Design Plan The reason I chose this design for my experiment is because it seemed to be more accurate than other testing methods I found during my literature review and could be performed with items I already had in my home. The experiment where the tester rang out the paper towels and measure the water that they had absorbed is less accurate because there is no guarantee of exerting the same amount of force each time you ring out a towel. There is no way to completely drain the towel of all of the liquid it absorbed. Stretching the paper towel samples across the embroidery frame is sound way to perform the experiment but it would have required the purchase of additional materials. C. Sequence of Events to Collect Quantitative Data I will begin the collection of quantitative data by cutting the paper towel samples from each brand into strips that are one inch wide by six inches long, to ensure that all of the samples will be equal. I will use the same glass of water for each test to ensure the water composition is the same for each test. I have created a spreadsheet in excel with a column listing each of the brands being tested and three columns for the time in tenths of a second to be entered upon completion of the experiment. During the experiment, I will make notes on a tablet of the brand name and the time recorded to be entered into the spreadsheet upon completion of the entire experiment. D. Describe Tools, Technologies, and Measurement Units that are used to Collect the Data To collect the data for this experiment I will use one inch wide by six inch long strips of paper towel from each of the brands being tested, a black water-proof marker to mark the strips of paper towel, an eight ounce glass of water, my hand to hold the strip vertical to the glass once submerged as indicated in the experimental procedure, a timer that measures tenths of a second, and a pad and pencil to record the initial results. Once the experiment is complete I will transfer the results of the experiments to the spreadsheet that I have created using Microsoft Excel. I will also use excel to create the graphic representation of the experiment results. Dependent, Independent and Controlled Variables of the Experiment The independent variable in my paper towel experiment is the one inch by six inch strip of paper towel taken from a roll of each brand of paper towel used in the experiment. The dependent variable in the experiment is the amount of time it takes the water to travel the length of the strip of paper towel measured in tenths of a second. The controlled variables of the experiment are using the same glass of water, same size sample of paper towel, and same timer for each test in the experiment. Threat Reduction to Internal Validity To reduce internal threats to validity I will use the same size piece of each paper towel from each brand for each test to conduct the experiment, marking each piece with a line at exactly one inch from the bottom. I will use the same water sample to ensure the liquid being absorbed by each sample strip is identical; the same timer will be used for each test to ensure the accuracy of the time recorded for each test. I will also monitor my results for outliers in the time required to absorb the water through each test towel to ensure the results are valid for each test. Hypothesis The sample of Bounty paper towels will soak up the water through the length of paper towel faster than the other brands because it is thicker than the other brands being tested. I have arrived at this conclusion because the dual layers of towel that are present in the sample of Bounty create a greater surface to absorb water. The other brands are much thinner and have less thickness to soak up water.

Discussion Essay Qustion Example | Topics and Well Written Essays - 250 words - 5

Discussion Qustion - Essay Example Venus is covered by carbon dioxide. This absorbs high amount of heat which relatively increases surface temperatures (Corfield, 2007). Earth is the only planet that supports life. Its atmosphere is made of different layers that include troposphere, thermosphere stratosphere, and mesosphere. It comprises of different percentages of moving air that is 78.2% of nitrogen, 1.0% of inert gases, 21.1% of oxygen, 0.04% and water vapor. In Mars the atmosphere is thin comprising of small traces of nitrogen, oxygen, carbon dioxide argon and small traces of water vapor (Corfield, 2007). Jovian planets, also known as outer planets are large in sizes and do not have surfaces that are in solid state. They are far from the sun and therefore cooler than the inner planets. The inner part of these planets is made up rocks at the core. Their atmosphere comprises of helium and nitrogen components. The first and the main difference between terrestrial and Jovian planet is the size where terrestrial planet is smaller in size. Secondly are their surfaces. Terrestrial planet it’s made of rocks while Jovian planet is made up of gases. Third is that the atmosphere of terrestrial planet is mainly made of nitrogen and carbon dioxide whereas the atmosphere of Jovian planet comprises of hydrogen and helium. Fourthly, terrestrial planets are nearer to the sun as compared to Jovian planets (Runcorn, 1988). Jovian planet is also known to rotate at faster rate than terrestrial

Critique Paper Essay Example | Topics and Well Written Essays - 750 words

Critique Paper - Essay Example The problem here is that this erosion of faith, according to the article, implies a general erosion in the notion of faith as something that binds people together with the rest of society. Implicitly the article says that without a basic faith in humanity what will happen to society? This is an insider’s look at what the writer sees as a disaster in the making. By insider is meant someone who is looking at life from the point of view of someone who has faith and who knows it to be fundamentally good thing, something very important that young people are missing out on, and consequently can lead society towards dark and sad paths: e.g. religious intolerance, hatred and distrust of others, the breakdown of social structures that all depend on people having faith in the basic goodness of social institutions and of others. The problem is that young people who do not have this insider’s view of the goodness of faith naturally will not trust one who is, because as the article notes, young people distrust religious organizations, and maybe even all kinds of religious talk too. There is thus something that operates like a deep chasm between the insider who sees faith as a good thing and a random young person who sees faith, organized religion, talk of god, and any language that hints at religion and spirituality as things to be discarded and thrown out (Sonenshine). On the other hand, the picture is not all completely bleak and hopeless. Looking at the stats for instance, while a large portion of young people distrust religion, a greater majority are still within the bounds of religion, and are insiders who have that basic trust in the religions they are in. About 70 percent are affiliated. Focusing on the bright side, moreover, there are many stories that highlight an advance in the consciousness of young people, towards inclusion and towards a greater faith not just in their own religion but in the religion

History and uses of carbonnanotubes Essay Example | Topics and Well Written Essays - 750 words

History and uses of carbonnanotubes - Essay Example The molecule has been known for the past fifteen years. The molecules were observed by employing high resolution transmission electron microscopy (HRTEM) (Rakov, 2002). It was referred to carbon nanotubes that were multi walled. The molecules contained two graphic layers and nested as Russian dolls. The molecules have diameters of four 4nm. Two years later Bethune and IBM Almaden research centre colleagues, lijima and ichihashi of NEC created a carbon nanotubes that were single walled. Single walled nanotubes were synthesized in the same way to multi walled carbon nanotubes but some metallic particles were added to the electrodes of carbon. The procedure resulted to the difference in appearance among the two molecules. The individual tubes are looped and curled than straight. Twenty fours ago, the electronic properties of single walled nanotubes were predicted by two different research groups. Their findings revealed that single walled nanotubes can either be semi conducting or metallic depending on their diameter or chirality. The prediction was later confirmed by the various experiments done (Crandall, 2007). Since then a review on synthesis, application, electronic properties, characterization and basic metallic properties of carbon nanotubes have been done. The various properties possessed by carbon nanotubes have made it the most investigated nanostructure materials. The various properties of carbon nanotubes have made companies and researchers to apply them in various fields. The molecule has been applied in the fields of energy. It has been applied as an anode for Li-ion batteries. The carbon nanotubes used, is usually coated with silicon to increase the capacity of the battery to more than ten times. Silicon expansion during the cycle of discharge has resulted to anode damage. The application of nanotubes to the silicon anode is aimed at preventing damage caused (Mordkovich & Karaeva,

MARKETING ASSIGNMENT Essay Example | Topics and Well Written Essays - 500 words

MARKETING ASSIGNMENT - Essay Example e strategies to address those needs, and development of long-term association with the customers by providing them with the products and services they required. â€Å"The Marketing concept resulted in a separate marketing department in organization and today we can see many organization have structured themselves as marketing organization where every employee is contributing towards customer satisfaction whether or not he’s a marketing person† (â€Å"What is Marketing?†). The marketing concept depends to a large extent upon the research conducted by the organization to identify the particular segments of customers, and their individualistic and collective needs. Marketing teams can achieve the satisfaction of their customers by identifying the target market and adopting the right marketing mix to achieve their objectives. The main marketing concepts are the identification of the customers’ needs and ways to fulfill them, assessment of the changing environment and the modifying needs of the customer with it so that not only the present needs of the customers can be addressed, but also measures can be taken to satisfy the expected needs in the future. It is very important for the organizational personnel to realize that marketing of the product or service an organization makes is not entirely the responsibility of the marketing department, but every department as well as individual in the hierarchy of organizational structure has a responsibility towards it. I have had personal experience of working with a firm in which the entire responsibility of marketing was limited to the marketing department, and other firm in which the responsibility was equally distributed among all departments so that the whole organization was structured into a marketing organization. I felt a lot of difference between the effectiveness of marketing between the two firms. Limitation of the marketing responsibility to the marketing department in the first organization was the

How dos th movi lddin rprsnt wht dwrd Sid clls orinttion Essay

How dos th movi lddin rprsnt wht dwrd Sid clls orinttion - Essay Example Unncssry to sy, th significnc of nimtd films oprts on mny rgistrs, but on of th most prsusiv is th rol thy ply s th nw "tching mchins." Disny films succd in mrging n idology of chrm nd imprssion of virtu in nrrting storis tht hlp childrn undrstnd who thy r wht socitis thy blong to nd wht tht socitis r bout. Th powr ths films possss stms from thir uniqu form f rprsnttion. Th importnc of nimtd films s sourc of nw discovris nd lrning t th sm tim is hightnd by th common cknowldgmnt tht schools nd othr public sits r incrsingly ovrwhlmd by crisis of motivtion. Th mss mdi, spcilly Disny, on th othr hnd crts drm-lik world of scurity, vn though childrn quit oftn find thmslvs in th joylss rlity of schooling. Th ductionl significnc of nimtd films mks popl mor wr of tching possibilitis of Disny movis. Mny critics trid to nswr th qustion whthr Disny's nimtd films r good for kids nd whthr thy hv n ductionl impct on young gnrtions. But, sms lik thr is no n sy nswr to this qustion. Disny's most rcnt film lddin (1992) prsnts bundnt opportunity to ddrss how Disny is rsponsibl in constructing cultur of joy for childrn. lddin is th story of so-clld "strt-rt" who knw tht h could b mor. Whn h finlly finds lmp contining gni who grnts thr wishs, it sms tht myb his drms could com tru. But n vil vizir is scrtly plotting his downfll, not to mntion tht th princss of his drms is bord with sing th sm old, stuffd-shirt, nd pcock princs. lddin hs sold ovr 3 million copis in 1993 nd hs rnd "$1 billion from box-offics incom. s commnttor in Nwswk ltly sttd, "Th mrchndis--Mrmid dolls, lddin undos, nd collctibls lik sculptur of Bmbi's Fild Mous--ccount for stunning 20 prcnt of Disny's oprting incom." Thr r mny puzzls in th movi tht childrn r supposd to b ddrssing nd solving ftr, for xmpl, in lddin th issu of socity nd uthority is cntrd primrily on th rol of th young strt trmp, lddin. Jsmin, th Princss h flls in lov with is simply n objct of his instnt longing s wll s socil stpping ston. In contrry, Jsmin's lif is lmost ntirly dfind by mn, nd, in th nd, hr hppinss is insurd by lddin who finlly is givn oky to gt mrrid with hr. Thr r mny smll things in lddin movi tht rprsnt mricn cultur, rcism which is lso rproducd through rcilly codd lngug nd ccnts. For xmpl, lddin portrys th "trribl" rbs with substntil, forign ccnts, whil Jsmin nd lddin spk stndrd nglish. nothr mzing portryl of rprsnttions nd cods in which childrn r tught tht culturl diffrncs tht do not br th imprint of whit, middl-clss thnicity r bnorml, low-grdd, brinlss. Th rcism in this nimtd movi is dfind by both th prsnc of rcist rprsnttions nd th bsnc of complx rprsnttions of fricn-mricns nd othr popl of color. Morovr, th rprsnttionl dpiction of history, progrss, nd Wstrn cultur is prfctly cpturd by dwrd Sid's notion of orintlism. Culturl diffrnc in Disny's movi lddin is prsntd through "nturlizd" rcil hirrchy. Morovr, on cn hrdly sy tht thr is somthing innocnt in wht kids lrn bout rc s portryd in th "mgicl world" of Disny. Thr r mny critics of this movi s wll s dvocts, Yousf Slm, formr spoksprson for th South By

Statement of Purpose Essay Example for Free

Statement of Purpose Essay My objective for graduate studies in Science is to prepare myself for the long term goal of pursuing a career in teaching and research. I have chosen to work in the area of Science which requires good Mathematical and Computer Science background. This decision will give me ample opportunity to consolidate my creative energies. My education suits this field as I have a Bachelor’s of Science with Honors in the field of Mathematics. I started teaching as soon as I finished BS (Honors) Mathematics in 2007. I taught Mathematics, Physics and Computer Science subjects to high school students, and greatly enjoyed this work. I live in Gujranwala, which is the seventh largest city of Pakistan. My surrounding has profound impacts on me. The social, economic and political instability in the region has stimulated me to play my part in the development of the people. Teaching gives me a sense of constructive participation in the region by giving others an intellect and funneling their energies in the constructive direction. At undergraduate level, I have studied courses both, analytical as well as numerical methods for Mathematical Modeling and Simulation, and Numerical Solutions of Ordinary Differential Equations and Partial Differential Equations with Analytical solutions. I have learned and developed capabilities of programming using C/C++, Matlab and Mathematica. Moreover I have studied subjects in Physics, Mechanics, Quantum Mechanics, Fluid Mechanics, Analytical Dynamics and Computer Networks. Pakistan is a developing country with insufficient experts in science. To serve the needs of this industry, science needs to be developed and used. Thus conditions here are very conducive towards an application of my aspirations, when I return after completing my graduate studies. I would consider it my privilege to be able to pursue my graduate studies in Sweden and avail the excellent infrastructural facilities and research opportunities offered by university. I am sure that the stimulating academic environment and interaction with the distinguished faculty at university will prove immensely fruitful and facilitate my development as an individual researcher in my field.