...Discussion: This lab experiment consisted in locating the metacentric point in order to test the buoyancy stability of a lab pontoon under certain circumstances. The metacenter is the point of intersection of the buoyant force and the center of gravity. In order to verify the stability conditions of an immersed body is necessary to locate its metacentric point. One of the conditions is that when the center of buoyancy and center of gravity are coincident, the body is stable. In this experiment the center of gravity was higher than the center of buoyancy causing a slight tilt when changing the position of mass, although it became unstable as the experiment carried on, it still was stable enough to produce a moment to counter the action as the metacenter increases. When the center of gravity is above the center of buoyancy, the location of metacentric Height is lower. In our experiment everytime there was a change on the position of mass that would increase the angle of tilt, the metacentric height and the position of mass would move to more than 0.05 m ,thus the metacentric height would be increase, however the possibility for the pontoon to tip would also increase significantly. ● Conclusion: The apparatus remained stable throughout the experiment. Data recorded for the metacentric point was obtained from theoretical and experimental formulas using two different centers of gravity, 0.075 m and 0.125 m. Although the position of mass changed with each trial...
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...I believe the Baby Lab is a valid experiment but I do not believe the results are interpreted the correct way. The Baby Lab tested babies judgement of ¨good” and ¨bad” actions. The Baby Lab did not have any outside variables I could see affecting the opinion of the babies that were not on purpose. This lab was also replicated multiple times by different people with similar results which allows me to be more confident in the experiment. The conclusion of the Baby Lab was babies are most likely born with a sense of right and wrong, good or bad. This conclusion was made off of 75%-80% of the babies tested chose a stuffed animal that acted with a sense of morality. I disagree that this conclusion is definite because as the critique stated...
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...Fall 2015 Analytical Chemistry I Quantitative Analysis Chem 341WI 4 Credit Hrs | Instruction Mode: L (lab) and P (class) Professor Andrew Holder holdera@umkc.edu • SCB 113 • 816-235-2293 • 913-543-3709 (fax) Office Hours: T/Th 1:00-4:00, 5:00 – 7:30 Lecture: T/Th 4PM | Labs: T/Th 1PM (AFT), 5PM (EVE) Credit: Lab + Lecture = 4 credits | Format: Lab + Lecture (P) Lecture / Class Policies and Procedures Correspondence with UMKC Student Learning Outcomes Scientific Reasoning & Quantitative Analysis * Apply principles/methods of sciencea, mathb, statisticsc and logicd to solve problems and draw logical inferences. * Chpt 3: Experimental Error (c) * Chpt 4: Statistics (c) * Chpt 6: Chemical Equilibrium (a, b, d, e, f) * Chpt 7: Activity & Systematic Trtmnt, (a, d, e, h) * Chpt 8: Monoprotic Acid-Base Equil., * Chpt 9: Polyprotic Acid-Base Equil. (a, d, e, g, h) * Develop quantitative literacy enabling comprehensione and evaluationf of info in broad contexts. * Chpt 3: Experimental Error, Chpt 4: Statistics (f) * Chpt 5: Quality Assurance and Calibration Methods (c) * Understand methodsg/principlesh of scientific discovery and their application * Sxn 0-2: The Analytical Chemist’s Job (g, h) * Sxn 0-3: General Stages in a Chemical Analysis (g, h) * Chpt 2: Tools of the Trade (g) * Carrying out laboratory analyses (g, h) ...
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...Electronics rely heavily on electronic switching and amplification to generate and capture the various signals which allow them to operate. A controllable valve that allows a small signal to control a much larger signal does this, and could be related to a controllable valve used in the control of water flow. This was once done by a device known as vacuum tube but was later brought down to a much lower production scale for a variety of industrial, economical and business related reasons. Bell Laboratories, the research arm of telecommunications company American Telephone and Telegraph’s (AT&T) director Mervin Kelly put together the first team of researchers and scientists placed on the task of research and development of a solid state-semiconductor later called a transistor that would supersede vacuum tubes and provide numerous advantages. The success of this development would prove to change the computing, electronics and telecommunications systems altogether. Up until the invention of the transistor a vacuum tube was used in the control, amplification and generation of electrical signals. Vacuum tubes are tubes usually made from glass and designed in an airtight manner as to keep the flow of “cathode rays” from external disturbance as they pass from each terminal and laid the foundation for numerous technical innovations, such as the light bulb discovered by Thomas Edison (fig. 1). Joseph John Thomson further made a vacuum tube and placed a third terminal to attain a grasp...
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...After conducting our experiment, we concluded that the hypothesis was correct. A change in the mass of a moving object does affect the speed of the object. We arrived at this conclusion by rolling five marbles with different masses down a small scale roller coaster and recording how long it took each marble to roll from the starting point to the ending point of the roller coaster. The data from our investigation is the amount of time it took each marble to go down our roller coaster in seconds. Each marble has five sets of data because we conducted five trials. In trial one, marble one took 1.919 seconds, marble two took 1.992 seconds, marble three took 1.799 seconds, marble four took 1.676 seconds, and marble five took 1.696 seconds. In trial two, marble one took 2.496 seconds, marble two took 1.776 seconds, marble three took 1.836 seconds, marble four took 1.843 seconds, and marble five took 1.856 seconds. In trial three, marble one took 2.102 seconds, marble two took 1.628 seconds, marble three took 1.547 seconds, marble four took 1.665 seconds, and marble five took 1.775 seconds. In trial four, marble one took 2.844 seconds, marble two took 1.852...
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...NETW420 ADVANCED NETWORK MANAGEMENT Title of the Lab School of Engineering and Information Sciences Instructor Name SUBMITTED BY: SUBMITTED ON: Table of Contents Objectives 3 Problem Definition 3 Background Theory 3 Methodology and Procedure 3 Observations, Data, Findings, and Results 4 Questions and Answers 4 Recommendations and Conclusions 4 Lessons Learned 4 Document Certification 4 Objectives * Write the purpose and usefulness of the lab experiment. * What are the main outcomes that will be addressed in this lab experiment? * For example, * This lab report investigates * network performance in a hub-based network; * the impact of quality of service (QoS) on VoIP and videoconferencing; and * the impact of intrusion prevention systems (IPS) on distributed denial of service (DDoS) attacks. Problem Definition * Discuss what you are trying to investigate. * Look at it this way: If there was nothing wrong, would you be performing this lab experiment? * What is not working right now that leads to the need of performing this lab experiment? * This will closely tie in with your recommendations later in the lab report. Background Theory * What networking theory is aligned with this lab experiment? * Perform a basic summary and analysis of the said theory, and explain how the theory will support the findings. Methodology and Procedure * For example, we use OpNet as a sandbox...
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...Alcatel-Lucent is a global telecommunications corporation located in Paris, France. It has, under its wing, Bell Laboratories aka Bell Labs. They were previously known as AT&T Bell Laboratories and Bell Telephone Laboratories is now the research and development subsidiary of the French-owned Alcatel-Lucent. Over the past eight decades, Bell Labs R&D gave birth to new technologies and seminal scientific discoveries. (Alcatel Lucent, para 1) Elisha Grey and Enos N. Barton formed Western Electric Company in 1869. Both of them started a small manufacturing firm based in Cleveland, Ohio which was to become the largest electrical manufacturing company in America. In 1881, Alexander Graham Bell, an extraordinary leader of American Telephone & Telegraph (AT&T), purchased a controlling interest in Western Electric and made it the exclusive developer and manufacturer of all equipments for the Bell telephone companies. Now, the Bell system has provided much telephone services and support to America and Canada in the 1877 to 1984. It was then led by AT&T. In 1898, Compagnie Générale d'Electricité (CGE) was born, founded by a French engineer named Pierre Azaria. It was involved in business with several industries in Germany. Mainly it dabbled in electricity, transportation, electronics and telecommunications. CGE then rose up the ranks and became a leader in digital communications and would be known as well to produce train à grande vitesse – high speed trains in France. In...
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...using experiments, observations, simulations, and quantitative approaches, processes that cause evolution in populations and the dynamics involved in interspecific relationships in communities and ecosystems. After completing a semester of this lab, students should be able to: • Describe the process of evolution and the processes that shape the distribution and dynamics of ecological systems. • Analyze and display data using Microsoft Excel and appropriate statistical tests. • Generate and test hypotheses using the scientific method and careful laboratory techniques. • Select relevant primary literature on a given topic and integrate information from multiple primary sources into a written scientific lab report, using appropriate citations. • Conduct an experiment, collect and analyze data, and write a scientific lab report according to the conventions of biology, using a process of staged writing and revisions. Texts: McMillan, V. E. 2012. Writing in the Biological Sciences, 5th ed. Bedford/St. Martin’s Press: Boston. Readings as assigned from the lecture text - Freeman et al., 2014. Biological Science, 5th ed. All lab handouts and other readings as appropriate for particular labs, which will be posted on Blackboard. Overview: The lab is designed to complement the lecture with hand-on exercises. In general, lab activities will cover information that you will have learned previously. However, out of necessity we will occasionally cover material in lab before...
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...it as ‘justifiable classroom discipline’. Researchers not only want to know whether labeling occurs. They also want to measure its effect on pupils’ self-esteem and achievement. Using material from Item A and elsewhere, assess the strengths and limitation of experiments for the study of labeling in schools (20 marks) Using experiments for studying the theory of labeling in schools can have many strengths and limitations, included in practical, ethical and theoretical factors. The labeling theory is the idea that categorizing group or individuals can seriously affect their behavior. Two types of experiments – fields and laboratory, can investigate the effects of this theory. Interpretivists typically use field experiments as they’re taken place in a more natural environment, such as a school; which are usually real life situations. They can also extract qualitative and valid data, meaning you can look deeper into the truth behind the study of labeling on children in schools. However there is lack of scientific credibility and so there isn’t any identified or controlled variables. Experiments are unlikely to be used by interpretivists. On the other hand, positivists are more likely to use lab experiments because they’re reliable. They are...
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...desperate times cause for desperate measures. In order to find life-savers, such as cures and treatments, scientists construct experiments using animal testing. Considering the fact that human beings and animals are similar, I do not debunk the idea of using animals in scientific labs. Due to the fact that human beings have amendments that animals do not, animal testing is sufficiently instrumental, because of the their similar living systems, because they do not have the rights and moral judgments that human beings do, and because animal usage incidentally goes on with or without the works of scientist lab experiments. Of course, the accurate way is not at all considerate in animals’ defense, but it is necessary. Lab research is required in order to find cures of common diseases, and animals are the best scapegoat to these experiments. For example, authors of “Animal Testing: Pros and Cons” recorded that chimpanzees share 99% of their DNA with humans, and mice are 98% genetically identical to humans. Because animals and human beings are both mammals, they derived from the same ancestors, and share the same organ system. Genetically, animals are the closest aspects of nature to human beings. As “” states, “even the most supercomputers are unable to accurately simulate the workings of complex organs such as the brain.” This statement supports the fact that lab testing cannot be accurately predicted using technology only and depends on the lives of living organisms. If one should argue...
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...Examine the reasons why some sociologists choose not to use experiments when conducting research. 20 Scientists set out to discover scientific laws of cause and effect. The method favoured by natural scientists for discovering these laws is the laboratory experiments take place in labs are considered more artificial. In this essay I will conclude the reasons why experiments are not used to evaluate research. In addition the field and the comparative method will also be outlined as wells as their strengths and limitations which is used by sociologists in their research. Field experiments takes place in real social world. positivist sociologists use laboratory experiments as they favour a more scientific method. Positivist sociologists however also acknowledge the short comings of laboratory experiments, such as, it is often impossible or unethical to control the variables. Also their small scale means that results may not be representative or generalisable to the wider population. On the other hand interpretivists reject the laboratory experiments because it fails to achieve their main goal of validity. It is an artificial environment producing unnatural behaviour. There are various practical problems with laboratory experiments. Society is VERYhttp://cdncache-a.akamaihd.net/items/it/img/arrow-10x10.png complex and in practice it would be impossible to control variables that may influence a situation. Therefore although the ability to control variables in laboratory conditions...
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...However, this number could go as high as 25 million. Each year the number of animals hurt or killed being tested on or experimented on go up. Animals usually suffer in medical labs, whether they experience life-threatening symptom from drugs or their living styling is torture for them. Fortunately, there are laws that protect these animals from being harmed, but not enough to protect all. However, these laws are found only in certain places. Experiments involving animals can range from something little to something huge. For example, a drug injected into a rat. This is a small experiment compared...
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...In this section, please describe the experiment in full detail, how it was carried out, equipment, temperatures, metal / fluid concentrations, etc. If you wish, and only in the case that you have followed the experimental procedure as outlined in the lab manual, you can simply make a reference to the lab manual. However, if your actual experiment deviated from the procedures given by the lab manual, you must write your own experimental procedure. If some parts of the experiment were already completed for you by the lab instructors, mention it. If you omitted some portions of the lab, mention it and explain why you did so. For example: In order to investigate the influence of all necessary casting parameters, foam patterns were assembled. The patterns were cut from expandable polystyrene (EP) slabs of known density using hot-wire. For this research, two types of foam slabs were used, low-density (LD: 0.021 g/cm3, 1.3 pcf) and high-density (HD: 0.026 g/cm3, 1.6 pcf). The pattern consisted of one pair each of thin (3.2 cm x 10 cm x 1 cm) and thick (3.2 cm x 10 cm x 1.5 cm). Sections were assembled together with hot melt glue. Following assembly, the pattern was dipped in a ceramic slurry of known density (35 Be or 45 Be) followed by drying in a circulating hot-air oven. Thereafter, the pattern assembly was placed into a casting flask. Synthetic mullite (AFS 35 GFN) was rained into the flask and compacted at 1g for 1 minute. The flask was designed with two compartments...
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...Lab oourses go virtual A Thomas F. Edgar University of Texas number of universities have main- tained a dedicated laboratory course as part of the process control sequence, but those numbers have been shrinking due to the high resource requirements of lab courses and the pressure to reduce the number of hours in the engineering curriculum. While some chemical engineering departments run a junior measurement lab and a senior unit-operations lab, many now operate only one lab in the senior year which may incorporate control-related experiments. Labo- ratory courses are evolving, and new directions are being examined at specific universities, combining elements of simulation and also dis- tance learning. In the chemical process industries, the high cost of pilot scale equipment and operating per- sonnel has led to greater reliance on computer- based simulations rather than traditional pilot- scale experiments. Consequently, today's engineers work more often from a control room or from behind a computer screen. Now, you LabView computer-interfaces of the VUOL give students an experience of controlling the equip- ment via the computer in addition to physically turning valves and checking temperatures. Another approach being employed involves the use of a computer connected to the Internet to allow students to carry out experimental studies in a remotely located physical laborato- ry. Permitting...
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...Laboratory Report Format 1. Title Page: The following is an example of the proper lab report title page format. Of course, you must substitute information pertinent to the specific lab and course. The title page will be a single, whole page. Laboratory Exercise #1 Verification of Ohm's Law by Fred Derf Lab Partner: Jonathan Dough EETH 1811 Electronic Circuit Technology Lecture Section 001 Lab Section 101 Performed on: February 31, 1994 Submitted on: March 1, 1994 To: Dr. Pepper 2. Objective(s) Describe in formal language (third person impersonal) the objective(s) of the lab. State the rules or theories to be investigated in the lab. Rule of thumb: someone else, using the same knowledge you have, should be able to complete the task given this information alone. In some cases, lab objectives may be given to you. You should expand these supplied objectives whenever appropriate. List all components (including values) and major equipment required to perform the exercise. Be sure to include make, model, and serial numbers of all equipment used. This listing should not include items such as meter leads or jumper wires, which are required for the use of the laboratory equipment. By listing the equipment itself it is implied that the necessary meter leads or other connecting apparatus is included. Provide all detailed schematics which, when implemented, will produce the results desired. Do not include developmental schematics here. Computer drawn schematics are preferable...
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