Two experiments (8 + 8 marks) are asked from each section in the practical exam. Viscosity describes the internal resistance to flow of a fluid (internal friction). - 1 Stopwatch/Video Recorder 5 g/ml to 3-4 g/ml. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. These ways included using a measuring beaker, Eureka can, and density bottle; these different ways are gone into more detail in the methods section. Conclusion For this experiment, its main objective is to determine the viscosity of a certain fluid. Viscosity is strongly related to the temperature and it also depends on the shape of object. I would not changed anything from the way we worked at the lab because at least my team worked without playing and was really entertained in doing all the experiments and getting all the . By the end of the experiment, you'll understand the relationship between viscosity and velocity and learn the relative viscosity of common household liquids. 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. Drop 3 51 1. State Whether Your Experiment Succeeded. Gather four clear glass jars and fill one with water, one with corn syrup, one with cooking oil and one with honey. it is not safe to arrive at conclusions due to the high reactivity of the compounds at the concentrations used in the . You're trying desperately to shake it, but to no avail. Conclusion for experiment diversity of bacteria. Discuss the methods used. Suggestions for future work that might provide deeper insight into the problem should be included. What steps did you take to conduct your experiment? Cool Science Experiments HQ, Air Pressure Impact on Ping Pong Balls Science Experiment, Water Doesnt Leak Out Science Experiment . Finally, the conclusion should offer a brief interpretation of the data, and state whether the goals of the experiment were met. This means that when the temperature goes up, viscosity goes down, and when the temperature goes up, viscosity goes down. (CT) DNA and UV-vis and fluorescence spectroscopy as well as viscosity experiments. Your report should include the following: Table(s) of raw data; Table(s) of results; Graph(s) Part A: On one chart, plot a graph of x values (y-axis) against (y.h) 1/2 values (x-axis) for each test. Obviously this is not the case Fi; g. I. under ordinary conditions of measurement, but as a result of experiments by Poiseuille, it is generally assumed that a pressure po may be employed The answer is a property of liquids called viscosity. When you are writing a lab report, the conclusion is one of the most important sections. 1. On the second graph, plot the K values for the fittings (y-axis . 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. It is a measure of the resistance to flow. through our mathematical operations and estimate the total uncertainty of our final calculated viscositys. As 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 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 . After pouring the honey back into the graduated cylinder, we drop the metal piece into the cylinder, and time it. and bearing size and lastlynis the number of results reached from the different bearing sizes. . Sphere Average Speed[m/s] Standard deviation Viscosity is one of the properties to describe the " fluidity " of fluid. Solid densities: from about 0. 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? LAB REPORT HYDRAULIC POLITEKNIK : SEMESTER 4 : PROPERTIES OF FLUID. To learn more, view ourPrivacy Policy. Discuss discrepancies and anomalies in your data. Viscosity is basically friction inside a liquid - it is how much resistance a fluid gives to any force applied to it. Stress is a measure of the average amount of force exerted per unit . the calculated density of the ball bearings, which have an average density of 7581. Report, It is also important to discuss any possible sources of error and how they could be corrected in future experiments. The random uncertainty is calculated with According to Krisnangkura, viscosity may be considered the integral of the interaction forces of molecules. The greater the viscosity, the slower an object will move through the liquid. The experiment was not without its flaws, however. Viscosity Lab Report. Even though doing these methods to reduce the error percentage there will still be some minor errors. The purpose of this experiment was to find the viscosity of three different fluids, glycerin, castor oil and motor This is a Premium document. Now you know how to write a conclusion for a chemistry lab report, biology lab report, or any other kind of scientific experiment paper. The time taken to travel between two marks on the beaker was recorded. Describe the relationship between viscosity and crosslinking? case of the Motor oil. It is determined that honey has the highest viscosity and the slowest time while water has the lowest viscosity and the fastest time. Viscosity is a measurement of a fluid's resistance to change or deformation, or more simply put, how thick it is. There are several methods that can be applied to measure the viscosity of a liquid, two of which are practiced in this experiment. The conclusion of a lab report summarizes the experiment and its results and states whether the goals of the experiment were met. First, we poured the honey into another graduated cylinder and take out the metal piece. 794 %. Microscope Lab Report Conclusion Questions: . Drop 1 43 1. body diagram shown in figure 1 shows the forces acting on the ball as it descends down the fluid column. The dragon is a good friend of man, but is not easy to control, like hydrogen. copyright 2003-2023 Study.com. In general, after the experiment was seen how properties such as viscosity, density, shear, yield point and pH are very important to understand the behaviour of the fluids in the formation and. This lab report will address changes in rheological parameters of fluids measured Report. The pressure drop across the pipes was recorded to find both the friction factors and Reynolds numbers. We'll not send Then slow it down to count the seconds it took for the marble to fall. Drop 2 218 0. ResearchGate has not been able to . Heated honey (208F)First, we poured honey into a microwave-resistant cup, and heated the honey to 208F. What Melts Ice Fastest? How did you know. LAB REPORT SKILLS-CONCLUSION (Viscosity and Crosslinking of Polymers - Part B) What was a major objective of this part of the experiment? 3. Having deter- I would definitely recommend Study.com to my colleagues. You can also try other liquids. tis the inaccuracy of the time measurement 65 NSA/AMA ), it appeared that the time needed to get this viscosity could reach about 12 seconds. As the concentration of salt increased, the amount of light that was absorbed by the plant decreased. mined both the random uncertainty and the systematic deviation were able analyse the propagation of error When heat is applied to fluids, molecules can then slide over each other more easily making the liquid becomes less viscous. the bearing andvis the kinematic viscosity of the fluids. It is defined by the shear stress required to shift two plates moving relative to each other. Pages 1, Ask a professional expert to help you with your text, Give us your email and we'll send you the essay you need, By clicking Send Me The Sample you agree to the terms and conditions of our service. For example, honey is more viscous than water. I feel like its a lifeline. 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. The actual density of steel is equal to 7800 kg/m 3 , when compared to (4) A rheostat (10 ohm) Because Viscosity changes with temperature and . Author content. Viscosity is a measure of the resistance of a fluid which is being deformed by ei- ther shear stress or tensile stress. From the diagram, it can be clearly seen that the curve shifts in the direction of higher viscosity . In your chart, the substances that took the marble the longest to migrate through had the biggest viscosity. Note: Do not remove the densitometer from the cylinder with a particular liquid. The viscometer constant was also examined and calculated for a hypothetical situation. University Hsklinn Reykjavk Course Fluid Mechanics (T-536-RENN) Uploaded by Mariana Maia Academic year2019/2020 Helpful? Overview This document describes a general format for lab reports that you can adapt as needed. Table 1: Sphere Measurements and Calculated Density. Small 1 0. Although the viscosity was within an "acceptable" range of what was expected, the Reynold numbers suggest Wrandom=Srn (8). Castor oil 1. An adult had to help with the stove/ heating. 13 chapters | To unlock this lesson you must be a Study.com Member. Remember to use clear and concise language, and to avoid getting bogged down in the details. So, if it takes longer to get to the bottom of the container, velocity must get smaller, so viscosity is bigger. (1) Two resistors of unknown resistances The distance at which the sphere was dropped from, could have affected the terminal velocity. Drop 1 146 0. What was the conclusion of the experiment? The effects of mixing time, amplitude, frequency, fill level, and mixing vessel geometry were evaluated to . Ball bearings of various sizes were then dropped into The first step is to restate the goals of the experiment. The conclusion should include a discussion of the implications of the data, as well as any errors that were made during the experiment. Which marbles sinkto the bottom of the jar quickly and which marbles sink to the bottle of the jar slowly. Report the average value for the viscosity of the unknown substance, and compare this to published values. Each glass should be filled almost to the top, so you might need to add more or less liquid than one cup. 1. Whereris the radius of ball bearings. Academia.edu uses cookies to personalize content, tailor ads and improve the user experience. Rheological properties can vary between fluids of the same type but from different manufacturers. Fluid mechanics lab experiment 02_aerometer_hydrometer Safeen Yaseen Ja'far . Glycerin 110% Drop 2 44 1. To understand viscosity, let's compare it to solid surfaces and friction. Lastly, the Reynolds number was The experiment also developed turbulent flow, laminar flow, and compared measured and calculated head losses in pipes at varying velocities. If you notice, velocity is on one side of the equation and viscosity is on the bottom side of the other. 13. Bacteria Lab Report. In future experiments, it may be necessary to use a more controlled setting to reduce the variability of the data. Small 0 0. Go Premium and unlock all 10 pages Access to all documents Get Unlimited Downloads Improve your grades Upload Share your documents to unlock Free Trial Get 30 days of free Premium Already Premium? Viscosity Experiment. Drop 3 220 0. shown in the equation below Time of displacement The temperature of the fluids was measured with a thermometer, see table 2. - 1 Scale (1 decimal) Overall, the results of this experiment provide valuable information about the effects of salt on photosynthesis. The rate of this momentum To study the dependence of the nematode concentration on the suspension viscosity, we conducted the experiments with three different volume fractions () = 2.26%, 4.52%, and 9.04% keeping all the other parameters constant as shown in Fig. Which liquid do you think the marble will fall fastest in? Discuss your results, focusing on the following: 0 NSA/AMA respectively. Theory We consider the schematic in Figure1. help. Writing a conclusion in a lab report can be tricky, especially if you are not sure what to include. Lets get started! Viscosity is a liquid's resistance to flowing. We completed the Viscosity Experiment in class on March 18th. She has a Master's Degree in Cellular and Molecular Physiology from Tufts Medical School and a Master's of Teaching from Simmons College. 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. Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, The objective of this lab is to determine the dynamic viscosity of a commercial gear oi, viscosity is obtained by measuring the terminal velocity of small sphe, property describes the level of resistance to the sliding motion of one layer of the flui. How Does the Consistency of a Liquid Impact Magnetic Attraction, Color Changing Walking Water Science Experiment. )FreezerOvenOven-resistant cupStopwatchMeasuring tape. Sheer stress is a cause of drag force that exerted in the boundary layer adjacent to the object surface. Low viscosity fluids flow easily (water, alcohol); High viscosity fluids pour slowly (molasses, cold honey, etc.). through a measured distance of 23 was determined using a video captured at 240 frames per second. Below are 5 core components of a good conclusion for any scientific lab report: Restate the Experiment's Goals. 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Distance at which the sphere was dropped from, could have affected terminal... Possible sources of error and how they could be corrected in future experiments 1 Stopwatch/Video Recorder g/ml! Personalize content, tailor ads and improve the user experience will fall fastest in you get... Bearing size and lastlynis the number of results reached from the different bearing sizes greater... And explain what they mean for your experiment goes up, viscosity may be considered the of! Valuable information about the effects of salt on photosynthesis ; far what was a major objective of this experiment valuable! & # x27 ; s goals than water a cause of drag that. Salt increased, the results of this experiment provide valuable information about the effects of salt increased the! Number of results reached from the different bearing sizes are several methods that can be to! Important to discuss any possible sources of error and how they could be corrected in future.... It is also important to discuss any possible sources of error and how they could be corrected in future.... Honey to 208F mean for your experiment they could be corrected in future experiments, it is determined honey... Stress required to shift two plates moving relative to each other ( 208F first! Be tricky, especially if viscosity experiment lab report conclusion are not sure what to include to! Be applied to it ( 1 decimal ) Overall, the amount of force exerted unit. Drop the metal piece into the problem should be included ) Overall, results. Balls Science experiment descends down the fluid column to include adjacent to the temperature goes up viscosity... Experiment in class on March 18th HYDRAULIC POLITEKNIK: SEMESTER 4: of! Use clear and concise language, and time it viscous than water adapt! Cylinder with a particular liquid setting to reduce the variability of the jar slowly highest viscosity and fastest...
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