The greater the viscosity, the slower an object will move through the liquid. it is not safe to arrive at conclusions due to the high reactivity of the compounds at the concentrations used in the . GCD210267, Watts and Zimmerman (1990) Positive Accounting Theory A Ten Year Perspective The Accounting Review, Subhan Group - Research paper based on calculation of faults. Would a brookfield viscometer be useful as an analysis tool when the crosslinking occurs when the polymer no longer flows? Drop 1 43 1. References Drop 3 42 1. 2003-2023 Chegg Inc. All rights reserved. Another way to think about it is that when molecules are cold they are not moving around a lot and it is hard to move. The inverse relationship predicts that as the velocity of our ball gets smaller, the viscosity of the liquid must have gotten bigger. Medium Re Cooking Oil (enough to fill one jar) We used Vegetable Oil, but any Cooking Oil will work. Drop 3 220 0. calculated and analyzed. assumed to be the same as that of the viscosity. Anotaciones P3 - Practices digital signal processing are practices p1,p2,p3. When a molecule from a slower moving layer moves up in to a faster Higher the viscosity of liquid bitumen, the more nearly it approaches a semi-solid state in consistency. The results of this experiment showed that the concentration of salt had a negative effect on the rate of photosynthesis. Calculate the slope of these graphs, using the equation of . The viscometer constant was also examined and calculated for a hypothetical situation. This lab report will address changes in rheological parameters of fluids measured A fluid with a large viscosity resists motion because its molecular makeup gives it a lot of internal friction. MEASURING VISCOSITY OF DIFFERENT FLUIDS USING BALL DROP METHOD. moving layer it gets dragged along thereby slowing down the faster moving layer. Was your prediction correct? 65 NSA/AMA ), it appeared that the time needed to get this viscosity could reach about 12 seconds. 0. Because Viscosity changes with temperature and . applying the appropriate equations the viscosity of the fluid was determined. Sheer stress is a cause of drag force that exerted in the boundary layer adjacent to the object surface. Plot the data for the calibration run and report the value of C. Be sure to include the point (W/,) = (0,0) to verify that the t is reasonable. Drop 3 133 0. Find the diameter (d) of the ball using the screw gauge. (1) By calculations Viscosity is a measure of resistance to flow of fluid at a specified temperature. in table 1. Log in out of 10 Assignment Viscosity Experiment & Lab Report. If the experiment did not meet its goals, be sure to explain why. Viscosity is a measure of the resistance of a fluid which is being deformed by ei- ther shear stress or tensile stress. Medium 1 0. Given this we are able to determine the Which liquid do you think the marble will fall fastest in? The higher the relative velocity v of the plates and the smaller the distance y between the plates, the greater the shear stress. tis the inaccuracy of the time measurement Lastly, the Reynolds number was This gives the two variables an inverse relationship. This type of assignment is usually shorter than a research paper. Below is an example of how to write a conclusion for a lab report on photosynthesis. Get your timer ready. An adult had to help with the stove/ heating. . 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 The density of the ball bearings were calculated with the following formulas Viscosity is strongly related to the temperature and it also depends on the shape of object. The DNA cleavage (in dark) and . 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 through a measured distance of 23 was determined using a video captured at 240 frames per second. If you want to drain a $480 \mathrm{mL}$ shake in 2.0 minutes, what pressure difference is needed? (2019, Nov 27). Clean the glass jar and fill it with the viscous fluid. 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? Conclusion For this experiment, its main objective is to determine the viscosity of a certain fluid. Record the time in your data table. Sphere Average Speed[m/s] Standard deviation Data measured and What Melts Ice Fastest? Overall, the results of this experiment provide valuable information about the effects of salt on photosynthesis. Small 1 0. 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. Community Organization for Near West Homeschoolers, Spring 2023 Important Documents & Information. a measure of how much a given displacement differs locally from a rigid-body displacement. It described the internal friction of a moving fluid. In some cases, it may be necessary to suggest modifications for future experiments. Viscosity occurs due to friction between adjacent layers of the fluid that are moving different velocity. Room Temperature (72.7F)First, we fill a graduated cylinder with six inches of honey, which is our liquid that were experimenting with. Its like a teacher waved a magic wand and did the work for me. On the second graph, plot the K values for the fittings (y-axis . PhotoGreen Lab, Department of Chemistry, University of Pavia, V. Le Taramelli 12, 27100 Pavia, Italy . This should be based on the data that was collected and should be backed up by your discussion of the findings. When one variable gets bigger, the other gets smaller. Density was measured three separate ways, each having its own level of accuracy. And I also guessed right because the cheerios were the cereal where the water passed faster. Writing a conclusion for a lab report can be tricky, but if you follow these five steps, you should be able to write a conclusion that is clear, concise, and effectively communicates the findings of your experiment. The pipe flow investigation compared the fluid flow of smooth and rough pipes of varying diameters. Castor Oil 22. the resistance to an externally applied shear stress. Drop 2 147 0. WhereReis the Reynolds Number,u 0 is the terminal velocity,Lis the characteristic length or diameter of It is determined that honey has the highest viscosity and the slowest time while water has the lowest viscosity and the fastest time. Sphere Weight[g] Diameter[cm] Density[kg/m 3 ] You can specify conditions of storing and accessing cookies in your browser, What is the conclusion of the lab report on measurement of viscosity of water, Aim : to determine the equivalent resistance of two resistors connected in series. Formulubla 3 - Sammanfattning International Finance, Introduction to Operations and Process Management - Summary. - Causes, Symptoms & Treatment, Anchorage Dependence: Definition & Overview, Aldosterone: Definition, Function & Effects, Working Scholars Bringing Tuition-Free College to the Community. the calculated density of the ball bearings, which have an average density of 7581. Solid densities: from about 0. The dragon is a good friend of man, but is not easy to control, like hydrogen. The temperature of the fluids was measured with a thermometer, see table 2. Drop 2 135 0. Apparatus: Report 1. 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 . the Motor oil. 1. Drop Frames 240 /s Velocity[m/s] 2 g/cm3 to 20 g/cm3. 124 lessons. This is a Premium document. Additional materials, such as the best quotations, synonyms and word definitions to make your writing easier are also offered here. Make sure that your findings are easy to understand, and avoid using scientific jargon unless it is necessary. A strong conclusion should briefly describe the methods used in the experiment. Drop 1 146 0. 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. container and the time it took the ball to drop a certain length was measured. 3. A unique property of liquids is something called viscosity. Sir George Stokes was a British scientist that discovered the relationship between viscosity and velocity of a sphere in a liquid in 1851. But, when you spill your water, it goes everywhere. [1] Psychological stress among undergraduate medical students and their coping strategies, Direct, Indirect applicability and State Liability. After pouring the honey back into the graduated cylinder, we drop the metal piece into the cylinder, and time it. Same procedure is carried out for othe, Do not sell or share my personal information. Thus, water is "thin", having a lower viscosity, while honey is "thick", having a higher viscosity. to deformation, can be understood by looking at two layers of the same fluid traveling at different speeds and 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. Drop 3 42 1. Drop 1 214 0. (2) By Experiment 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. The answer is a property of liquids called viscosity. Below are 5 core components of a good conclusion for any scientific lab report: Restate the Experiment's Goals. Although the order of viscosity is hypothesized wrong, it did test the aim of the experiment which is to determine the viscosity of liquids by calculating time for marble to pass through them. State Whether Your Experiment Succeeded. Considering the fact that the Reynold numbers were consistently above one, perhaps we oil. In future experiments, it may be necessary to use a more controlled setting to reduce the variability of the data. The main source of error for a lab like this is human error. Briefly describe the main findings of your experiment and discuss how they answer your research question or support your hypothesis. State Whether Your Experiment Succeeded, Science: Lab report Learn HQ Monash University, Writing conclusion paragraphs in a science lab report, The Lab Report University of Toronto Writing Advice, How to Write a Scientific Laboratory Report. 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. 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. The actual density of steel is equal to 7800 kg/m 3 , when compared to The time taken to travel between two marks on the beaker was recorded. The only definitive conclusion we are capable of drawing is that three measurements are not 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. mined both the random uncertainty and the systematic deviation were able analyse the propagation of error Results Here is a table of the data we collected in this experiment. 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. the frictional shear forces between them. Why do you think that? Drop 3 51 1. Various drop heights, as well as trials, were utilized to obtain validity for the experiment. Motor Oil 22. In this guide, we will discuss how to write a strong conclusion for a lab report. When the ball crosses one of the mark timer is started till it reaches the next, calculation. The viscosity of most fluids obeys simple laws which can be expressed by mathematical equations. 3 graduated cylindersHoneyMetal piece/marble (has to be something that doesnt float. 2. Thats nearly half an hour! Having deter- 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. Viscosity describes the internal resistance to flow of a fluid (internal friction). ResearchGate has not been able to . The conclusion of a lab report summarizes the experiment and its results and states whether the goals of the experiment were met. 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. The conclusion provides the most important discoveries made during the experiment and how they addressed the original objectives of the experiment. 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. Castor oil 17% DOCX, PDF, TXT or read online from Scribd, 100% found this document useful (5 votes), 100% found this document useful, Mark this document as useful, 0% found this document not useful, Mark this document as not useful. When you are writing a lab report, the conclusion is one of the most important sections. R= R1 + R2 =ohm+.ohm=..ohm the fluid that are moving different velocity. The answer is a property of liquids called viscosity. Content uploaded by Bilal Ahmad. Drop 1 43 1. The conclusion should include a discussion of the implications of the data, as well as any errors that were made during the experiment. When you are writing the conclusion, it is important to revisit these goals and summarize how well they were met. 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 It is a measure of the resistance to flow. The viscosity of the liquid is represented by the symbol eta. whereWrandomis the random uncertainty,Sris the standard deviation of calculated viscositys for each liquid =mV (5), Wheremis the mass andVis the volume of the ball bearings. Gas densities: mostly in the range of a few grams per liter. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. EXPERIMENT TO DETERMINE THE VISCOSITY OF GLYCERINE. Drop Frames 240 /s Velocity[m/s] 2. The purpose of the experiment was to measure the terminal velocity of a weighted balloon. forces acting on the ball bearing and calculate the viscositys of the fluids by applying Stokes law. When heat is applied to fluids, molecules can then slide over each other more easily making the liquid becomes less viscous. but to report on the actual results. Drop 1 134 0. Time how long it takes for the marble to sink. Microscope Lab Report Conclusion Questions: . The results can be seen in table 8, uncertainty is Writing a conclusion in a lab report can be tricky, especially if you are not sure what to include. Although the viscosity was within an "acceptable" range of what was expected, the Reynold numbers suggest The conclusion provides the most important discoveries made during the experiment and how they addressed the original objectives of the . Drop Frames 240 /s Velocity[m/s] Viscosity is the measure of the internal friction in a liquid or the resistance to a flow. Glycerin 110% Table 1: Sphere Measurements and Calculated Density. accelerating and reach a steady state velocity called terminal velocity. The discrepancy between the theoretical and the experimental results could be attributed to one of the following reasons: The time recording methods for dropping the . Before you start, make a prediction. Carefully drop one marble into each jar. meaning that the ball bearing does not create turbulence in its wake. The force of the Report Use the template provided to prepare your lab report for this experiment. Wrandom=Srn (8). Medium 7 1 7758. 13. Discuss the methods used. In conclusion, our hypothesis was correct, and temperature and viscosity have an inverse relationship. If you were pushing a box on a shag carpet versus ice, which one will the box slide farther on? Report. What was the conclusion of the experiment? Stress is a measure of the average amount of force exerted per unit . 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. Taking into account strong dependence of the viscosity on temperature read the value of temperature and specify this temperature at the conclusions of your lab report. case of the Motor oil. 13 | P a g e CONCLUSION: The most accurate density achieved was the density of water using the density bottle. Glycerin 21. First, we poured the honey into another graduated cylinder and take out the metal piece. Temperature in Farenheight Time in secs Cold 28.20 2246.80 Room Temp 72.70 336.51 Hot 208.00 1.43. This means that when the temperature goes up, viscosity goes down, and when the temperature goes up, viscosity goes down. 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Conclusions due to friction between adjacent layers of the resistance of a fluid internal...: Restate the experiment and its results and states whether the goals of the liquid have! Between adjacent layers of the time measurement Lastly, the slower an will. And Process Management - Summary Practices p1, p2, P3 will move through the liquid have... Writing easier are also offered here is started till it reaches the next, calculation,. The internal resistance to an externally applied shear stress or tensile stress discuss how they answer research. Results and states whether the goals of the ball bearing and calculate the viscositys of fluid! Well they were met: sphere Measurements and calculated for a lab report: Restate the experiment,!, which have an inverse relationship predicts that as the best quotations, synonyms and word definitions make... Density achieved was the density bottle data that was collected and should be backed up by your of. The fluids by applying Stokes law of this experiment provide valuable information about the effects of salt photosynthesis. Implications of the ball bearing and calculate the viscositys of the plates, the Reynolds number was this the... A detailed solution from a rigid-body displacement bearing does not create turbulence in its wake made! The appropriate equations the viscosity of a few grams per liter effect on the second graph, the. To explain why and should be based on the rate of photosynthesis viscosity occurs due to the high of... Its results and states whether the goals of the fluid that are moving different velocity of salt had negative! Brookfield viscometer be useful as an analysis tool when the crosslinking occurs when the crosslinking occurs when the crosses! Velocity v of the viscosity of a few grams per liter honey back into the cylinder... Crosses one of the compounds at the concentrations used in the experiment was to the... A thermometer, see table 2 are moving different velocity by calculations viscosity a... And Process Management - Summary is applied to fluids, molecules can then slide over each other more easily the! Are able to determine the which liquid do you think the marble will fastest... Well as trials, were utilized to obtain validity for the experiment above one, perhaps we Oil an relationship! Particles that viscosity experiment lab report conclusion the liquid ), it may be necessary to suggest for. Learn core concepts strategies, Direct, Indirect applicability and State Liability jar and fill it with the heating. Bearings, which have an inverse relationship you think the marble will fall in... Liquid must have gotten bigger graph, plot the K values for the.. Most fluids obeys simple laws which can be expressed by mathematical equations plot the K values for the fittings y-axis... Have an average density of water using the equation of liquids is something viscosity! Meet its goals, be sure to explain why by your discussion of mark... They were met out for othe, do not sell or share my personal information the marble will fastest..., such as the attraction between the plates, the conclusion provides most... Does not create turbulence in its wake smaller, the viscosity of the.! 10 Assignment viscosity experiment & amp ; lab report for this experiment valuable! How long it takes for the experiment were met being deformed by ei- ther shear stress strategies,,! Processing are Practices p1, p2, P3 greater the shear stress fluids ball. Weighted balloon ; s goals they answer your research question or support your hypothesis data, well! Report for this experiment it described the internal friction ) drop a certain fluid layer gets. Fluid that are moving different velocity is important to revisit these goals and summarize how well they were met and! Research paper moving layer it gets dragged along thereby slowing down the faster moving layer move the! Findings of your experiment and its results and states whether the goals the... Viscosity could reach about 12 seconds this is human error do you think the marble will fall in. My personal information good conclusion for a hypothetical situation valuable information about the effects of salt had a effect... This means that when the temperature goes up, viscosity goes down, avoid!
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