This type of assignment is usually shorter than a research paper. A lab report should include a conclusion that analyzes the final data. Drop Frames 240 /s Velocity[m/s] acting on the sphere but the sum of all the forces will be zero. All other trademarks and copyrights are the property of their respective owners. Clean the glass jar and fill it with the viscous fluid. Experiment Biological Diversity [k6nqwo3ve1nw] 2022-10-13 . Unfortunately, these equations can be solved only in very few cases, but when they can be solved it is found that fluids move in exact agreement with the mathematical predictions. This supports the hypothesis that salt can inhibit the process of photosynthesis. Discuss your results, focusing on the following: Drop Frames 240 /s Velocity[m/s] Two experiments (8 + 8 marks) are asked from each section in the practical exam. Castor Oil 22. Drop 2 135 0. Your report should include the following: Table(s) of raw data; Table(s) of results; For Part A, on one graph, plot the head loss across the fittings (y-axis) against the velocity head (x-axis). Obviously the syrup will flow slower than the water in Glycerin 3. Conclusion for experiment diversity of bacteria.These bent rods are often called vibrios and include Vibrio cholerae, which causes Bacteria are the smallest living Staphylococcus aureus are up to 1 m in diameter. Calculate the slope of these graphs, using the equation of . When the honey is hot, its molecules are moving around a lot and this makes it easier for the honey to move to different places, because the molecules are not just sitting there and not moving. Discuss the methods used. A moody diagram was plotted comparing the friction factor versus the Reynolds number. By referring to various web sites, it was found that the viscosity for Castro oil and glycerol at room temperature were 0. what was expected, the Reynolds number suggests that the premise and assumption of laminar flow was a Large 0 0. Higher the viscosity of liquid bitumen, the more nearly it approaches a semi-solid state in consistency. balls were weighted on a scale and their diameter measured with a caliper, the measurements were collected Various drop heights, as well as trials, were utilized to obtain validity for the experiment. (1) Two resistors of unknown resistances The flow of a liquid depends on the Reynolds number as depicted in the equation below; HypothesisMy hypothesis is that when the temperature goes up, the viscosity goes down, and when the temperature goes down, the viscosity goes up. spheres of a known mass and density into an oil. Ch09 - Chapter 09 solution for Intermediate Accounting by Donald E. Kieso, Jerry J. Medium 1 0. Drop one marble at a time and observe what happens to the marble when it enters the liquid. We reviewed their content and use your feedback to keep the quality high. The experiment objective in principle was achieved and many new techniques were learned and developed. Enrolling in a course lets you earn progress by passing quizzes and exams. A factor closely associated with renal disease status in clinical diagnosis is abnormal human serum albumin (HSA) concentration levels in human body fluids urine, serum, etc. Psychological stress among undergraduate medical students and their coping strategies, Direct, Indirect applicability and State Liability. In a lab flow test using Athabasca tar sand and propane as solvent, 50 percent of the bitumen was recovered as upgraded oil. In your chart, the substances that took the marble the longest to migrate through had the biggest viscosity. We completed the Viscosity Experiment in class on March 18th. Discuss discrepancies and anomalies in your data. Castor oil 1. 65 and 1. There are number of different techniques by which fluid's resistance to flow is measured. This will help to ensure that readers understand how the data was collected and can evaluate its reliability. As Introduction: Viscosity is a property of liquids that measures a fluid's resistance to flow. Thus, water is "thin", having a lower viscosity, while honey is "thick", having a higher viscosity. Drop Frames 240 /s Velocity[m/s] This suggests that high concentrations of salt can inhibit the process of photosynthesis. Filtration time was 1.5 h for the SGO membrane, whereas 48 h were required for the GONS membrane due to higher viscosity. The density of the ball bearings were calculated with the following formulas The conclusion should include a discussion of the implications of the data, as well as any errors that were made during the experiment. the same circumstance, this is because syrup has a higher viscosity than water reason for this resistance You're trying desperately to shake it, but to no avail. . Report 1. It is determined that honey has the highest viscosity and the slowest time while water has the lowest viscosity and the fastest time. the ball bearing reaches its terminal velocity, the forces acting on the ball will have reached equilibrium, as Lab results and process calculations show that low-pressure, low-energy solvent-based in situ processes have considerable technical and economic potential for upgrading and recovery of bitumen and heavy oil. Note: Do not remove the densitometer from the cylinder with a particular liquid. Since velocity is equal to distance divided by time, velocity is inversely proportional to time as well. directly proportional to the velocity gradient within the fluid, for most comm, relationship is described using the equation: [2], The methods in this experiment determine the dynamic viscosity through dropping. And I also guessed right because the cheerios were the cereal where the water passed faster. Drop Frames 240 /s Velocity[m/s] I had to wait 37 minutes, 26.8s (2246.8s) for the metal piece to reach the bottom! Fluids with high viscosity act the opposite; they are thick and it is hard for objects to move through them. By reducing errors and obstructions it will justify data for better discuss and . From the diagram, it can be clearly seen that the curve shifts in the direction of higher viscosity . Become Premium to read the whole document. Report. However, further sensitivity improvement is required to achieve . Medium Re Stokes's law states that: Where v is the velocity of the ball, g is acceleration due to gravity, r is the radius of the sphere, d1 is the density of the sphere, and d2 is the density of the liquid. The answer is a property of liquids called viscosity. 65 NSA/AMA ), it appeared that the time needed to get this viscosity could reach about 12 seconds. R = ..ohm, Which of the following forces are dissipative in nature. The distance at which the sphere was dropped from, could have affected the terminal velocity. The conclusion of a lab report summarizes the experiment and its results and states whether the goals of the experiment were met. Drop 2 42 1. Solid densities: from about 0. Sphere Average Speed[m/s] Standard deviation We'll not send you 5 g/ml to 3-4 g/ml. The time taken to travel between two marks on the beaker was recorded. Small 2 0 7728. whereWrandomis the random uncertainty,Sris the standard deviation of calculated viscositys for each liquid The purpose of this experiment was to find the viscosity of three different fluids, glycerin, castor oil and motor I feel like its a lifeline. body diagram shown in figure 1 shows the forces acting on the ball as it descends down the fluid column. She has a Master's Degree in Cellular and Molecular Physiology from Tufts Medical School and a Master's of Teaching from Simmons College. A lab report conveys the aim, methods, results, and conclusions of a scientific experiment. - 3 Cylindrical Containers with the same size containing: Glycerin, Motor Oil and Castor Oil meaning that the ball bearing does not create turbulence in its wake. By the end of the experiment, you'll understand the relationship between viscosity and velocity and learn the relative viscosity of common household liquids. The viscometer constant was also examined and calculated for a hypothetical situation. In this guide, we will discuss how to write a strong conclusion for a lab report. When one variable gets bigger, the other gets smaller. the frictional shear forces between them. If the friction is high, it's going to slow down the marble and it will take more time for it to reach the bottom, meaning it's moving with a smaller velocity. Considering the fact that the Reynold numbers were consistently above one, perhaps we It is a measure of the resistance to flow. bearing size fall time nine times instead of three different bearing sizes, three different times would have given Although the viscosity was within an "acceptable" range of what was expected, the Reynold numbers suggest The driving force of capillary viscometers is gravitational force, and the flowing time of the liquid is determined due to gravitational force. The viscosity of most fluids obeys simple laws which can be expressed by mathematical equations. forces acting on the ball bearing and calculate the viscositys of the fluids by applying Stokes law. 005 gandmis the weight of each individual bearing size. Gender dysphoria: Should gender non-conforming individuals under the age of 16 be allowed to undergo medical treatment? With the use of similar apparatus equipment through constant temperature at atmospheric pressure, the viscosity will be determined by tests in two different fluids in sets of two ball trials; along with data collected from a third set. the fluid that are moving different velocity. Was your prediction correct? Overall, the results of this experiment provide valuable information about the effects of salt on photosynthesis. Briefly describe the main findings of your experiment and discuss how they answer your research question or support your hypothesis. Introduction and Theory. LAB REPORT SKILLS-CONCLUSION (Viscosity and Crosslinking of Polymers - Part B) What was a major objective of this part of the experiment? The results showed that as the concentration of salt increased, the rate of photosynthesis decreased. )FreezerOvenOven-resistant cupStopwatchMeasuring tape. Viscosity of vegetable oil in the range of engine oil, Antimicrobial Activity of Thyme (Thymus vulgaris) Essential Oil Against Listeria monocytogenes Scott A (page 151), The Food Chemistry Laboratory: A Manual for Experimental Foods, Dietetics and Food Scientists, Second Edition, 9076Emulsions Foams and Suspensions - Fundamentals and Applications, MECHANICAL PROPERTIES OF FLUIDS 10.1 INTRODUCTION, Introduction to Fluid Mechanics, Fourth Edition, PUMPS AND MOTORS CONTINUING EDUCATION PROFESSIONAL DEVELOPMENT COURSE, Title: Design of Diesel reactor heated by steam boiler using jatropha cake as a fuel, MEASUREMENT OF VISCOSITY OF LIQUIDS BY THE STOKE'S METHOD, Chemical Engineering Fluid Mechanics (2016), VALVES AND FITTINGS CONTINUING EDUCATION PROFESSIONAL DEVELOPMENT COURSE. This is why it is perfectly acceptable to reject the hypothesis. through the fluid, exerting a shear force on the fluid surrounding it. Carefully drop one marble into each jar. Small 0 0. The actual density of steel is equal to 7800 kg/m 3 , when compared to Worse yet, each professor wants something a little different. following formula. Viscosity measurements can vary depending on the accuracy of the test equipment. The point of your lab report is not to merely confirm what you expect. If you want to drain a $480 \mathrm{mL}$ shake in 2.0 minutes, what pressure difference is needed? Viscosity is a measure of the resistance of a fluid which is being deformed by either shear stress or tensile stress. somewhat optimistic one. Bacteria Lab Report. The experiment shows that the slower the time, the higher the viscosity is for a liquid and the faster the time, the lower the viscosity is for a liquid. This should be based on the data that was collected and should be backed up by your discussion of the findings. Anotaciones P3 - Practices digital signal processing are practices p1,p2,p3. Liquids that have a LOW viscosity flow quickly (ie. Hint: What is the experiment title? Lets get started! Viscosity occurs due to friction between adjacent layers of the fluid that are moving different velocity. Holy moly! This is where you will summarize all of your findings, and explain what they mean for your experiment. Amanda has taught high school science for over 10 years. WhereReis the Reynolds Number,u 0 is the terminal velocity,Lis the characteristic length or diameter of 13 | P a g e CONCLUSION: The most accurate density achieved was the density of water using the density bottle. , er (0 - 1.5A) 1. ResultsHere is a table of the data we collected in this experiment. Viscosity is a measure of the resistance of a fluid which is being deformed by ei- ther shear stress or tensile stress. Temperature in Farenheight Time in secsCold 28.20 2246.80Room Temp 72.70 336.51Hot 208.00 1.43. LAB REPORT HYDRAULIC POLITEKNIK : SEMESTER 4 : PROPERTIES OF FLUID. Same procedure is carried out for othe, Do not sell or share my personal information. Drop 1 146 0. Answer: Viscosity Lab Report Conclusion It is determined that honey has the highest viscosity and the slowest time while water has the lowest viscosity and the fastest time. 35 Easy Science Experiments You Can Do Today! Similarly, if a fluid has less viscosity (thickness), an object can move faster through it. Experiment 6: Viscosity (Stoke's Law) Viscosity is a property of uids (liquids and gases) which determines how much resistance is experienced by an object . Drop Frames 240 /s Velocity[m/s] From the pressure diagrams, it was concluded that there was a high-pressure gradient at the leading edge and decreased through the aerofoil. Abstract: Experiment 1 looks at two fluid properties, density and viscosity. Cool Science Experiments HQ, Air Pressure Impact on Ping Pong Balls Science Experiment, Water Doesnt Leak Out Science Experiment . Below are 5 core components of a good conclusion for any scientific lab report: Restate the Experiment's Goals. State Whether Your Experiment Succeeded. Record the time in your data table. Designed and Developed by Online Homework Help, How to write a conclusion for a lab report + examples, How to write a descriptive essay about favourite food, Ethnographic Essay: how to write an ethnography paper, Data analysis section of a research paper, How to write an introduction for a lab report, How to write a biology lab report + examples, How to write a discussion in a lab report + examples, How to write an executive summary for a lab report + examples, How to write an abstract for a lab report, How to write a lab report for chemistry + Examples, How to Write a Conclusion for a Lab Report, 5. VISCOCITY Viscosity is a measure of the resistance offered by a fluid to flow. This was quite impossible in our experiment to be obtained. The antibody sequence is a key determinant for high viscosity of highly concentrated solutions; therefore, a sequence- or structure-based tool that can identify highly viscous antibodies from . Report the average value for the viscosity of the unknown substance, and compare this to published values. In everyday terms (and for fluids only), viscosity is "thickness". The results indicated that although the viscosity was within an acceptable range of can attribute a part of this systematic error to turbulence and the increased drag thereof, especially so in the The simplest case refers to a lubrication model and is represented by the ow of a non-Newtonian power-law uid between two smooth parallel plates If you were pushing a box on a shag carpet versus ice, which one will the box slide farther on? 2003-2023 Chegg Inc. All rights reserved. Medium Temperature [C] The results can be seen in table 8, uncertainty is Each glass should be filled almost to the top, so you might need to add more or less liquid than one cup. Introduction Practical investigation into Viscosity in liquids(Stokes Law) Introduction When dealing with fluid/mechanical systems, it is important to know what affects the rate of descent of an object through a liquid. To understand viscosity, let's compare it to solid surfaces and friction. Sheer stress is a cause of drag force that exerted in the boundary layer adjacent to the object surface. A unique property of liquids is something called viscosity. IntroductionViscosity is a liquids resistance to flowing. Finally, the conclusion should offer some suggestions for further research. Drop 1 52 1. R= R1 + R2 =ohm+.ohm=..ohm Because of this, if a solid object is dropped into a fluid of lesser density. The free If you notice, velocity is on one side of the equation and viscosity is on the bottom side of the other. All the record results were fine but with some error percentage suitable to some different factors, one way is to rope the spheres just above the surface to reduce the increase in velocity, also the errors can be minimized by recording the timings precisely and increasing the number of repetition of the time recording to get an accurate average. Drop 2 53 1. What was the conclusion of the experiment? Lab reports are the most frequent kind of document written in engineering and can count for as much as 25% of a course yet little time or attention is devoted to how to write them well. The apple juice had also higher density than the water itself. 13 chapters | Liquid densities: from about 0. 10. Density was measured three separate ways, each having its own level of accuracy. buoyancy is given by the following equation, Wherefluidis the density of the fluid,Vis the volume of the sphere andgis the gravitational acceleration. Viscosity is a measurement of a fluid's resistance to change or deformation, or more simply put, how thick it is. The temperature of the fluids was measured with a thermometer, see table 2. Time of displacement enough to determine viscosity with an acceptable degree of accuracy and that perhaps, measuring the same REQUIREMENTS: 999 kg/m 3 , we find that we It is a measure of a fluid's resistance to flow. This can be done by briefly revisiting the research question or hypothesis, and providing a brief overview of the main findings. Drop 2 147 0. Given this we are able to determine the This suggests there is a factor in the measurements or premise thats causing a systematic The results of this experiment showed that the concentration of salt had a negative effect on the rate of photosynthesis. 2. Students looking for free, top-notch essay and term paper samples on various topics. Sphere Average Speed[m/s] Standard deviation What was the conclusion of the experiment? Below is an example of how to write a conclusion for a lab report on photosynthesis. the following equation Repeat step 2 for the remaining liquids. Honey sure has high viscosity! Your report should include the following: Table(s) of raw data; Table(s) of results; A description, with illustrative sketches or photos, of the flow characteristics of each experimental run. In deriving the well-known viscosity formula v=--- ngr4pt mnplv 8vl 8ntl it is assumed that the pressure is constant during the time of flow. Controlled Variables: Amount of liquid, mass of the object. After that, well record its viscosity by dropping a metal piece and recording the amount of time it took to reach the bottom. How much did you enjoy doing the experiment? You do not need to go into detail, but you should make sure that all of the important information is included. 794 %. After pouring the honey back into the graduated cylinder, we drop the metal piece into the cylinder, and time it. Students also viewed 4.1 - Efnislegar eignir Prentform MAVI Spurningar 1 Exam 11 December 2012, questions @2019 - All Right Reserved. Time how long it takes for the marble to sink. Lastly, the Reynolds number was Whereris the radius of ball bearings. 10.6 Viscosity Test of Bitumen 10.6.1 Introduction Viscosity is reverse of fluidity. The experiment also developed turbulent flow, laminar flow, and compared measured and calculated head losses in pipes at varying velocities. By using our site, you agree to our collection of information through the use of cookies. Basically, they have an inverse relationship. Viscosity Lab Report. Today, we're going to investigate the viscosity of some household fluids to understand the relationship between velocity of an object, a marble, and viscosity. Is there another way you could measure viscosity or crosslinking? Gather four clear glass jars and fill one with water, one with corn syrup, one with cooking oil and one with honey. A milkshake has a viscosity of $0.50 \mathrm{Pa} \cdot$ s. To drink this shake through a straw of diameter $0.56 \mathrm{cm}$ and length $22 \mathrm{cm},$ you need to reduce the pressure at the top of the straw to less than atmospheric pressure. Castor oil 17% the Motor oil. The main purpose of a lab report is to demonstrate your understanding of the scientific method by performing and evaluating a hands-on lab experiment. The greater the viscosity, the slower an object will move through the liquid. P2 - Practices digital signal processing are practices p1,p2,p3. By continuing well assume youre on board with our cookie policy, Dont waste Your Time Searching For a Sample, Two Factors Affect The Viscosity Of Magma, Reaction Of Alkali Metals With Water Lab Report, Coping With Water Scarcity, Poor Water Quality and Inadequate Sanitation, CH 456: Determination of Water Hardness of Filtered and Unfiltered Water, ASK writer for It described the internal friction of a moving fluid. The data suggest that high concentrations of salt can inhibit the process of photosynthesis, which has important implications for the agriculture industry. Viscosity Of Water Lab Report. Conclusion For this experiment, its main objective is to determine the viscosity of a certain fluid. Would a brookfield viscometer be useful as an analysis tool when the crosslinking occurs when the polymer no longer flows? When the rate of shearing strain is directly proportional to the shearing stress, the constant of proportionality is called as absolute viscosity or dynamic viscosity. water, rubbing alcohol, and vegetable oil). Cross-Linking Poly (vinyl alcohol) with Sodium Borate Objective:The objective of this experiment is to explore the change in physical properties of a polymer as a result of cross-linking. (3) A voltmeter (0 - 1.5V) To browse Academia.edu and the wider internet faster and more securely, please take a few seconds toupgrade your browser. Drop 3 220 0. spam or irrelevant messages, We use cookies to give you the best experience possible. Wrandom=Srn (8). and the procedure is described in Section4. 5(d). Medium 7 1 7758. 10. What Melts Ice Fastest? The density distribution was analyzed for a mixture of high-melting explosive (HMX) and trinitrotoluene (TNT). With the condition of defining the composition of the mixture for several weeks, it could be analyzed that the separation of the substances yielded a condition of making a specific disntinction on how the volume of acetic acid in vinegar is affected by the concentration of the other elements that has been added into the substance. There was a high degree of variability in the data, which could be attributed to the fact that the plants were not kept in a controlled environment. By including all of this information, a lab report can provide a comprehensive overview of an experiment and its results. =mV (5), Wheremis the mass andVis the volume of the ball bearings. Widely, it is used for measuring the viscosity of Newtonian fluids. A strong conclusion should briefly describe the methods used in the experiment. The lower the viscosity of a liquid, the thinner the liquid is and the less resistance it experiences. Ball bearings of various sizes were then dropped into EXPERIMENT TO DETERMINE THE VISCOSITY OF GLYCERINE. Method1. The effects of mixing time, amplitude, frequency, fill level, and mixing vessel geometry were evaluated to . Room Temperature (72.7F)First, we fill a graduated cylinder with six inches of honey, which is our liquid that were experimenting with. The only definitive conclusion we are capable of drawing is that three measurements are not This means that when the temperature goes up, viscosity goes down, and when the temperature goes up, viscosity goes down. In conclusion, our hypothesis was correct, and temperature and viscosity have an inverse relationship. LAB REPORT SKILLS-CONCLUSION (Viscosity and Crosslinking of Polymers - Part B) - What conclusions can you draw regarding the viscosity and solubility of a polymer as a function of crosslinking? During the experiment the relationship between the drop distance of the balloon and the time taken to travel that distance were investigated. Your email address will not be published. Start by filling each glass with one of the liquids. error in our results. Describe the relationship between viscosity and crosslinking? Retrieved from https://paperap.com/paper-on-viscosity-lab-report/. The main source of error for a lab like this is human error. 2. The result of adding more cross-linking agents to a polyme. Conclusion. Drop 2 218 0. This gives the two variables an inverse relationship. Microscope Lab Report Conclusion Questions: . 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As fluid move in downward direction drag force and, When the net force is zero in object, then object attains a terminal velocity, so upward force equal to, In laminar flow there is no disruption between adjac, turbulence fluid motion, the resistance result from velocity fluctuation of t, loss. Content uploaded by Bilal Ahmad. The final step in concluding a lab report is to state whether the experiment was successful or not. Summarize the findings. The conclusion provides the most important discoveries made during the experiment and how they addressed the original objectives of the . Viscosity depends on the size and shape of the particles that make the liquid, as well as the attraction between the particles. that the premise and assumption of laminar flow was a somewhat optimistic one, especially so in the case of After checking its the right temperature with a waterproof cooking thermometer, we check the viscosity of the cold honey by dropping the metal piece in and recording how long it took to reach the bottom. us a better estimate of the viscosity. oil. container and the time it took the ball to drop a certain length was measured. The viscosity of the liquid is represented by the symbol eta. 3. it is not safe to arrive at conclusions due to the high reactivity of the compounds at the concentrations used in the . 1.6 Conclusion It is clear that there is an ever increasing global burden of obesity, hypertension and cardiovascular disease, and diabetes with serious consequences and implications . Conclusion The objectives of the experiment to demonstrate Poiseuille's law and use the relation to calculate the kinematic viscosity of water were satisfied using the Ubbelohde viscometer. On the second graph, plot the K values for the fittings (y-axis . Report. The answer is a property of liquids called viscosity. Community Organization for Near West Homeschoolers, Spring 2023 Important Documents & Information. The ancient Chinese mythological figure Nezha has powerful abilities (similar to a fiber optic sensor) and many magic weapons, such as the Universe Circle, Damask, and Hot Wheels. The experiment was conducted by releasing each ball bearing size 3 times into the fluids. Get your timer ready. through our mathematical operations and estimate the total uncertainty of our final calculated viscositys. The pressure drop across the pipes was recorded to find both the friction factors and Reynolds numbers. mined both the random uncertainty and the systematic deviation were able analyse the propagation of error Abstract. Drop 3 51 1. Drop one marble into one fluid. Since we're just interested in how viscosity affects velocity of the sphere, let's look at how those two variables are related in the equation.
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