Biology Lab Essay - 831 Words

Lab Report: Scientific Method Your Name: Alyssa Melincoff Purpose of this Lab What is the goal of this lab? What question is it trying to answer, or what problem is it trying to explain? To find out how table salt affects the boiling temperature of water. Hypothesis After reading the lab instructions - but before starting the lab - record your best â€Å"educated guess† about what will happen in the experiment. What hypothesis can you generate about the effect of adding salt to water? Adding table salt to boiling water will cause the water to boil at a higher temperature Experimental Design List the materials used in this lab, and the procedure you followed. Materials: 1.Kitchen Stove 2. 2 cup measuring cup 3. sharpie†¦show more content†¦Use the digital thermometer. Record the temperature when the pot reaches a rolling boil. Data Record the data you collected in the lab. (The data table and the graph.) Table 2. Boiling point temperatures of various salt solutions. Beaker/Concentration of NaCl (M) Boiling Point Temperature ( °C) Analysis Analyze the data you collected in the lab. How does the data presented above relate to the hypotheses you generated earlier in lab? Are any hypotheses disproved by your experiment? Use your graph to determine the boiling point of a solution made with 2  ½ tablespoons. This use of a graph has generated a hypothesis that a 2  ½ tablespoon solution boils at __219__degrees F. Prepare a 2.5 M solution and verify your hypothesis.Correct! †¢Is the hypothesis correct? Yes. Adding table salt to water causes the water to boil at a higher temperature. †¢Problems with doing the experiments. The temperature readings were hard to make. Gloves had to be worn to keep my hands from getting too hot. Had to be careful that the stove heat was not hitting the thermometer. †¢Other things learned. Be careful when adding salt to boiling water. It makes the water boil vigorously for a second or two. Conclusion After conducting the experiment, how would you now explain the problem(s) or answer the question(s) raised when you described the purpose of the lab? Be sure to base your answer on the data you collected. If you are given aShow MoreRelatedBiology Lab Report1286 Words   |  6 PagesStudy area: Present study is based on laboratory work; however the plant material for experimental purpose will be collected from experimental farm of CSIR-IIIM (32.73N and 74.87E). Objectives: 1. Full length cloning of squalene synthase, squalene epoxidase, ÃŽ ²- amyrin synthase CYP88D6, CYP172A54, the five known genes involved in glycyrrhizin biosynthesis from Glycyrrhiza glabra. 2. 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Fluid mechanics Free Essay Example, 1500 words

Task Learning Outcome 3 Determine head losses in pipeline flow Q1: Calculate the flow of water under gravity in litres/sec between the two reservoirs in Figure 1 below. 5.6m Pipe à ¸ 11cm in steel (k=0.20mm) 15.78m Figure 1 Solution: The length of the pipe may be approximated to be ≈ ---ïÆ'   L = 16.7442 m. Assuming a completely turbulent flow (dependent on pipe roughness), the friction factor may be estimated by the von Karman equation: f = and, plugging in values gives f = ---ïÆ'   f = 0.022813 Then, by Darcy-Weisbach equation = f * * where = head loss due to friction = difference in levels of water (5.6 m) v = fluid’s average velocity (m/s); g = acceleration due to gravity (9.81 m/s2) Arranging the equation for v – v = = = 5.6249 m/s pipe’s area @ cross – section = * = 0.0095 m2 Thus, the volumetric flow rate (under gravity), V = 5.6249 m/s * (0.0095 m2) * = 53.44 L/sec Task 2 – Learning Outcome 3.2 Determine Reynolds’ number for a flow system and assess its significance Q2: As an engineer in an industry, you are required to pump oil (density 900 kg/m3, viscosity 0.12Ns/m2 and flow rate 0.2m3/s) in a 15 cm diameter pipe over a distance of 120m. (a) Calculate the critical velocity and the Reynolds’ number in the pipe. critical velocity, v = (volumetric flow rate per unit area of cross – section) cross – sectional area, A = * = 0.01767 m2 so that, v = = 11.32 m/s = = ---ïÆ'   = 12,735 (turbulent) (b) Calculate the power required (per metre) to pump the oil horizontally at a mass flow rate of 30kg/s. We will write a custom essay sample on Fluid mechanics or any topic specifically for you Only $17.96 $11.86/pageorder now For turbulent flow with < 100,000, Prandtl equation applies as— = 2.0 log whereupon substitution of the found: = 2.0 log yields f ≈ 0.0289927 (by trial & error) Since the flow is strictly horizontal (no turns/bends, elevation, nor expansion/contraction along pipe length) then, energy – balance with the Bernoulli equation reduces to: ÃŽ £F = (where pump work solely accounts for friction losses) And by Darcy-Weisbach equation, ÃŽ £F = f * * = ---ïÆ'   ≈ 1,486.08 Based on this, the required power would be the product of the work term and the mass flow rate, being Power = (1486.08 m*N/kg) (30 kg/s) = 44,582.4 watts For each meter of the pipe length, Power = ---ïÆ'   Power = 0.3715 kW/m (c) Calculate the power required (per metre) to pump the oil horizontally at a mass flow rate of 120kg/s.

Computers And Its Impact On The Workplace - 927 Words

According to the U.S. Census Forty-four million households, or 42 percent, had at least one member who used the Internet at home in the 2000. Today, no doubt, even more family members in the United States use computers. Most people are aware of the desktop computers which can be found in the home and in the workplace. What are the different types of computers and what are their purposes? Computers can be classified into three different categories of home computers, portable computers, and business computers including workstations and super computers. First, what is a computer? While the term computer can apply to virtually any device that has a microprocessor in it, most people think of a computer as a device that receives input from the user through a mouse or keyboard, processes it in some fashion and displays the result on a screen. Home computers are being used by children, teenagers, and adults. The PC or personal computer is designed to be used by one person. The term, Mac, is a PC, but most people link computers with Windows software such as Windows 98, Windows 2000, or Windows XP. A PC is actually a desktop that is designed to be used in one set location. Most desktops offer more power, storage, and versatility for less than their portable brethren. Many desktop computers are used at home and at work. Various types of software have been designed to meet individual needs of the computer user. The use of home computers or PCs can be for various purposes such asShow MoreRelatedThe Impact Of Computer Surveillance At The Workplace2122 Words   |  9 PagesAssessment of the Impact of Computer Surveillance at the Workplace Abstract Computer surveillance refers to the use of computers to track the activity of individuals at the workplace. It is a common practice especially in industries that have a large number of employees whom they cannot monitor in person. The research will examine computer monitoring as one of the methods which the management uses to monitor employee activity at the workplace. The researcher will examine the advantages of computer monitoringRead MoreThe Internet Usage At Workplace1320 Words   |  6 Pageslimited activities they could perform when using the computer at work, however with the advance of technology the computer and the Internet enabled a wide range of tools employees can work with. These technological developments have a huge impact, both positive and negative, and are also affecting the way Internet is being used in the workplace. On the positive side, the Internet improved the way employers and employees communicate in the workplace, providing a faster and more efficient way of transmittingRead MoreThe Impact Of Technological Change On Business1252 Words   |  6 PagesFC511 Group M10 Assessment title: Essay Title: the impact of technology on business in the last fifteen years. Tutor name Steven Powell. 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It will also explain the positive impact social media usage has in the workplace, such as allowing communication to a broader audience. In addition to the positive usage, this topic will also explore the negative implications usage can cause. Because social media is still relatively new, there are not many laws establishing the proper guidelines for these sites in the workplace. Scholarly articl es such as the ‘Workplace impact of social networking† examineRead MoreEmployee Privacy Rights In The Workplace Essay1390 Words   |  6 PagesThe issue of privacy is a big concern in the workplace. With the expanding of new technology, many employees are concern about his or, her privacy in the workplace. Employees have the right to go to work knowing that his or, her employer will not invade their privacy. The rights to privacy in the workplace only provide limited protection for workers against monitoring and breach of confidentiality. The National Work Rights Institute states, under the federal law, the limited protection the Electronic

English Essay for Hurling Insults and Vehemently Criticizing

Question: Discuss about theEnglish Essay for Hurling Insults and Vehemently Criticizing. Answer: In the article, People blame Facebook for fake news and partisan bile. Theyre wrong, the authors argue that although social media channels have been accused of provoking political turmoil in America, causing political instability, by hurling insults and vehemently criticizing the political leaders is power, the charge is barely true. Forestal and Philips argue that social media might have emerged to be a platform that enables its users engage in conversations more openly on a public domain, but it does nothing more than unravel what has been existing in the society since long before (Forestal et al.). The authors point out that the very DNA of sites like Twitter makes them antithetical to sophisticated, thoughtful political conversation.. With the emergence of social media sites, one notices how supporters of a political party are being subject to racial and sexual abuse on social media sites like Twitter, or how supporters of a political party sling mud at supporters of a rival part y openly, and uttering the most uncensored, abominable words humanity has ever heard of. However, social media sites do not incite this hatred nor does it cause such venomous speech, as these technologies might instead beuncoveringthe fissures that already exist within the American public.. Rather it brings on the surface what had always existed, but had not been unraveled in absence of a public medium. Instead of blaming social media sites for having corrupted the democracy, it is exigent that the American citizens open their eyes to the problem, and try to shape their ethical attitude towards a political problem. Although the above argument presented by the authors is partially true, it is undeniable that social media does turn people into thoughtless political extremists. Hence, the points stated by the author are highly objectionable, and the topic sentence of the essay is that social media does play an active role in creating political turmoil. . It is indeed true as pointed out by Forestal and Philips, that communal hatred, racial abuse and utter disrespect towards the opposing party has always been there. However, as critics like Enli have argued, the social media sites help in aggravating the situation, by provoking others to join some atrocious pages, which intend to make atrocious memes of the political leaders and their supporters (Enli et al.). While earlier one would keep his abusive words and slangs confined to himself and his friends, social media sites like Twitter or Facebook helps his inflammatory ideas rise to the top of the conversation, become viral in a while, and with re- tweets and likes and shares, larger number of people are getting influenced by such ideas. While memes have emerged to be the lowest and cheapest forms of socio-political discourse, Bennett has argued that the social media channels help one to hide behind the cover, and promote a shouting-down of the opposition, without trying to adopt an analytical way of evaluating the political situation (Bennett). While the authors state that racial and sexual abuse and utter indignation towards the political leaders of the opposing party have always been a problem , it should be noted that people participating in even the most abominable political discourses also had little interest and knowledge about political affairs. On the other hand, social media users, regardless of their knowledge in political matters, get attracted to the meaningless ramblings of the uninformed people and their degrading posts, and make the sense of enmity viral in a short while. Even if this does not help in creating a problem that had been existing since a long time back, helps in aggravating the situation, by creating a sense of enmity, confusion and hatred amongst all, influencing the majority of people (Zhu et al.). To sum it up, it should be noted that even though social media is not the only medium that promotes political turmoil and social instability, it does play a crucial role in falsifying information, misquoting political speeches, misrepresenting political agendas and encouraging political instability and conflicts. Hence, unchecked use of social media can prove to be detrimental in future. Reference List: Bennett, W. Lance. "Changing societies, changing media systems: Challenges for communication theory, research and education."Can the Media Serve Democracy?. Palgrave Macmillan UK, 2015. 151-163. Enli, Gunn, and Hallvard Moe. "Introduction to Special Issue: Social media and election campaignskey tendencies and ways forward."Information, Communication Society16.5 (2013): 637-645. Forestal, Jennifer et al. "Analysis | People Blame Facebook For Fake News And Partisan Bile. TheyRe Wrong.".Washington Post. N.p., 2017. Web. 8 May 2017. Zhu, Qinfeng, Marko Skoric, and Fei Shen. "I Shield Myself From Thee: Selective Avoidance on Social Media During Political Protests."Political Communication34.1 (2017): 112-131.