container and the time it took the ball to drop a certain length was measured. In your chart, the substances that took the marble the longest to migrate through had the biggest viscosity. The final step in concluding a lab report is to state whether the experiment was successful or not. You can also try other liquids. (2019, Nov 27). 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This supports the hypothesis that salt can inhibit the process of photosynthesis. Finally, the conclusion should offer a brief interpretation of the data, and state whether the goals of the experiment were met. Was your prediction correct? Create an account to start this course today. Assignment Viscosity Experiment & Lab Report. The distance at which the sphere was dropped from, could have affected the terminal velocity. Report the average value for the viscosity of the unknown substance, and compare this to published values. How much did you enjoy doing the experiment? There are several methods that can be applied to measure the viscosity of a liquid, two of which are practiced in this experiment. Additional materials, such as the best quotations, synonyms and word definitions to make your writing easier are also offered here. Discuss discrepancies and anomalies in your data. PhotoGreen Lab, Department of Chemistry, University of Pavia, V. Le Taramelli 12, 27100 Pavia, Italy . 10.6 Viscosity Test of Bitumen 10.6.1 Introduction Viscosity is reverse of fluidity. 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 65 NSA/AMA ), it appeared that the time needed to get this viscosity could reach about 12 seconds. A moody diagram was plotted comparing the friction factor versus the Reynolds number. Drop 1 146 0. 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. Time how long it takes for the marble to sink. that the premise and assumption of laminar flow was a somewhat optimistic one, especially so in the case of Of course, some liquids are more viscous than others. Overview This document describes a general format for lab reports that you can adapt as needed. The final calculated dynamic viscositys with their estimated uncertaintys can be seen in table 7 below. Drop 3 146 0. Calculate the slope of these graphs, using the equation of . Conclusion: Each glass should be filled almost to the top, so you might need to add more or less liquid than one cup. Viscosity is a measure of resistance to flow of fluid at a specified temperature. 3. balls were weighted on a scale and their diameter measured with a caliper, the measurements were collected Report Use the template provided to prepare your lab report for this experiment. Gas densities: mostly in the range of a few grams per liter. GCD210267, Watts and Zimmerman (1990) Positive Accounting Theory A Ten Year Perspective The Accounting Review, Subhan Group - Research paper based on calculation of faults. 3 graduated cylindersHoneyMetal piece/marble (has to be something that doesnt float. Repeat step 2 for the remaining liquids. the fluid that are moving different velocity. Drop 3 220 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. Content may be subject to copyright. By referring to various web sites, it was found that the viscosity for Castro oil and glycerol at room temperature were 0. 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Revised on July 15, 2022. Viscosity is a measure of the resistance of a fluid which is being deformed by ei- ther shear stress or tensile stress. 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. The Physics Practicals For Class 12 CBSE is given here so that students can understand the experiments in a better way.experiment, we include viscosity and attempt to verify Poiseuille's . WhereReis the Reynolds Number,u 0 is the terminal velocity,Lis the characteristic length or diameter of 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. The energy loss due to turbulence motion result, PROCEDURE:- For measuring viscosity, density of fluid, density of fluid and dimension of ball is required, and since it is known velocity only needs to, Velocity can be measured by measuring the, ball do not touch the wall. 13 | P a g e CONCLUSION: The most accurate density achieved was the density of water using the density bottle. R= R1 + R2 =ohm+.ohm=..ohm Using the measurements and 2. Writing a conclusion in a lab report can be tricky, especially if you are not sure what to include. The results indicated that although the viscosity was within an acceptable range of The density of the ball bearings were calculated with the following formulas acting on the sphere but the sum of all the forces will be zero. The viscosity of a fluid describes its resistance to movement or deformation, an easy way of conceptualizing Drop 2 42 1. - 1 Stopwatch/Video Recorder Drop 3 133 0. 1. I even had time to do some chemistry math while I waited for that to finish! Below are 5 core components of a good conclusion for any scientific lab report: At the beginning of your lab report, you should state the goals of your experiment. The ice has less friction, so the box will slide further. Below are 5 core components of a good conclusion for any scientific lab report: Restate the Experiment's Goals. Although the viscosity was within an "acceptable" range of what was expected, the Reynold numbers suggest For example, if you were testing the effects of different concentrations of salt on photosynthesis, you would want to mention that the results showed a decrease in photosynthesis as the concentration of salt increased. Lab Report: Water and Ice Does ice have more or less volume than water. Apparatus: (1) By calculations Nguyen Quoc Trung. Then, we cool the honey down by putting it into the freezer. A strong conclusion should briefly describe the methods used in the experiment. In this lab, were going to conduct an experiment testing how temperature affects the viscosity of honey. copyright 2003-2023 Study.com. case of the Motor oil. Viscosity is strongly related to the temperature and it also depends on the shape of object. Students also viewed 4.1 - Efnislegar eignir Prentform MAVI Spurningar 1 Exam 11 December 2012, questions Enrolling in a course lets you earn progress by passing quizzes and exams. Sphere Weight[g] Diameter[cm] Density[kg/m 3 ] Given this we are able to determine the different diameter, different density of oil and stop watch. - 1 Thermometer Fweight=Fdrag+Fbuoyancy (1), We calculate the drag force acting on the ball by using the Stokes law equation, whereis the viscosity,Ris the radius of the ball bearing andvis the velocity of the ball. the resistance to an externally applied shear stress. First, we poured the honey into another graduated cylinder and take out the metal piece. 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. 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. @2019 - All Right Reserved. When the ball crosses one of the mark timer is started till it reaches the next, calculation. Whereris the radius of ball bearings. Enter the email address you signed up with and we'll email you a reset link. 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. Log in out of 10 This suggests that high concentrations of salt can inhibit the process of photosynthesis. Hint: What is the experiment title? Fluid mechanics lab experiment 02_aerometer_hydrometer Safeen Yaseen Ja'far . Table 1: Sphere Measurements and Calculated Density. The first step is to restate the goals of the experiment. 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