Content uploaded by Bilal Ahmad. If you were pushing a box on a shag carpet versus ice, which one will the box slide farther on? oil. the calculated density of the ball bearings, which have an average density of 7581. 4 clear glass jars of the same size (we used pint-sized mason jars). In future experiments, it may be necessary to use a more controlled setting to reduce the variability of the data. 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. This was quite impossible in our experiment to be obtained. Bacteria Lab Report. Medium 1 0. A graph of the experimental friction factor was compared . The first step is to restate the goals of the experiment. 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. Sphere Average Speed[m/s] Standard deviation This site is using cookies under cookie policy . Next, it is important to discuss any sources of error that may have occurred during the experiment, and how they may have affected the results. Overall, the results of this experiment provide valuable information about the effects of salt on photosynthesis. 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. Glycerin 110% The ice has less friction, so the box will slide further. Lab Report: Water and Ice Does ice have more or less volume than water. following formula. Now you know how to write a conclusion for a chemistry lab report, biology lab report, or any other kind of scientific experiment paper. Abstract. Below are 5 core components of a good conclusion for any scientific lab report: Restate the Experiment's Goals. Viscosity is a measure of the resistance of a fluid which is being deformed by either shear stress or tensile stress. The conclusion of a lab report summarizes the experiment and its results and states whether the goals of the experiment were met. Holy moly! Lets get started! 3. Drop 2 147 0. A fluid can be a gas or a liquid, and it is easy to see that liquids are thicker than gases, and therefore have higher viscosities. The conclusion should include a discussion of the implications of the data, as well as any errors that were made during the experiment. Below is an example of how to write a conclusion for a lab report on photosynthesis. How did you know? 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. The point of your lab report is not to merely confirm what you expect. what was expected, the Reynolds number suggests that the premise and assumption of laminar flow was a 2. What was the conclusion of the experiment? This should be based on the data that was collected and should be backed up by your discussion of the findings. This is a Premium document. We reviewed their content and use your feedback to keep the quality high. Sorry, preview is currently unavailable. Glycerin 3. Higher the viscosity of liquid bitumen, the more nearly it approaches a semi-solid state in consistency. 10. 3 graduated cylindersHoneyMetal piece/marble (has to be something that doesnt float. 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. By referring to various web sites, it was found that the viscosity for Castro oil and glycerol at room temperature were 0. You can download the paper by clicking the button above. Academia.edu no longer supports Internet Explorer. Clean the glass jar and fill it with the viscous fluid. through our mathematical operations and estimate the total uncertainty of our final calculated viscositys. The actual density of steel is equal to 7800 kg/m 3 , when compared to Report Use the template provided to prepare your lab report for this experiment. The viscosity of the liquid is represented by the symbol eta. The measured viscosity of water matched the theoretical value. Introduction and Theory. Drop 2 135 0. IntroductionViscosity is a liquids resistance to flowing. Regardless, the results for the fluids viscosity are consistently above the 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. 13. Finally, the conclusion should offer some suggestions for further research. - 1 Caliper, Figure 3: Cylindrical containers - Glycerin, Motor Oil and Castor Oil, WhereWsystemis the systematic deviation,mis the advertised inaccuracy of the scale estimated to be mined both the random uncertainty and the systematic deviation were able analyse the propagation of error Drop Frames 240 /s Velocity[m/s] From the diagram, it can be clearly seen that the curve shifts in the direction of higher viscosity . 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. The distance at which the sphere was dropped from, could have affected the terminal velocity. Drop one marble at a time and observe what happens to the marble when it enters the liquid. Castor oil 1. We completed the Viscosity Experiment in class on March 18th. Filtration time was 1.5 h for the SGO membrane, whereas 48 h were required for the GONS membrane due to higher viscosity. that the premise and assumption of laminar flow was a somewhat optimistic one, especially so in the case of can attribute a part of this systematic error to turbulence and the increased drag thereof, especially so in the Drop 3 220 0. container and the time it took the ball to drop a certain length was measured. 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. Motor oil 05%, For result analysis and evaluation we calculated the average Reynolds number for each fluid with the assumed to be the same as that of the viscosity. To learn more, view ourPrivacy Policy. 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. The apple juice had also higher density than the water itself. Drop one marble into one fluid. a measure of how much a given displacement differs locally from a rigid-body displacement. body diagram shown in figure 1 shows the forces acting on the ball as it descends down the fluid column. Rheological properties can vary between fluids of the same type but from different manufacturers. Liquid densities: from about 0. the bearing andvis the kinematic viscosity of the fluids. Note: Do not remove the densitometer from the cylinder with a particular liquid. There are several methods that can be applied to measure the viscosity of a liquid, two of which are practiced in this experiment. Temperature in Farenheight Time in secs Cold 28.20 2246.80 Room Temp 72.70 336.51 Hot 208.00 1.43. On the second graph, plot the K values for the fittings (y-axis . She is also certified in secondary special education, biology, and physics in Massachusetts. Table 8: Mean Reynold Numbers from final results. water, rubbing alcohol, and vegetable oil). When a molecule from a slower moving layer moves up in to a faster Before you start, make a prediction. Viscosity is a measure of the resistance of a fluid which is being deformed by ei- ther shear stress or tensile stress. Lastly, the Reynolds number was Solid densities: from about 0. Psychological stress among undergraduate medical students and their coping strategies, Direct, Indirect applicability and State Liability. Drop Frames 240 /s Velocity[m/s] Males with five or more risk factors are three times more likely to report chronic obstructive respiratory disease than males with two or less risk factors. Motor Oil 22. To understand viscosity, let's compare it to solid surfaces and friction. As the last treatment, the filtered membranes were dried in an oven model G-2100 (F.LLI GALLI G. & P. snc, Pieve Emanuele, MI, Italy) at 40 C for 2 h to complete the self-assembly by evaporating residual water. LAB REPORT SKILLS-CONCLUSION (Viscosity and Crosslinking of Polymers - Part B) What is the real-world implications from this experiment? tis the inaccuracy of the time measurement Even though doing these methods to reduce the error percentage there will still be some minor errors. 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. meaning that the ball bearing does not create turbulence in its wake. The experiment was not without its flaws, however. case of the Motor oil. 10.6 Viscosity Test of Bitumen 10.6.1 Introduction Viscosity is reverse of fluidity. The answer is a property of liquids called viscosity. By doing a reverse engineering calculation using the equation given in the lab sheet for Castro oil (0. Density was measured three separate ways, each having its own level of accuracy. Drop Frames 240 /s Velocity[m/s] 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. @2019 - All Right Reserved. Conclusion. Drop 1 214 0. The results can be seen in table 8, uncertainty is University Hsklinn Reykjavk Course Fluid Mechanics (T-536-RENN) Uploaded by Mariana Maia Academic year2019/2020 Helpful? This gives the two variables an inverse relationship. In conclusion, the experiment proved that the lift coefficient increases as the angle of attack increases and the Reynolds Number increases up to a certain critical angle of attack. Viscosity Lab Report. In this experiment, you're going to learn about viscosity. Considering the fact that the Reynold numbers were consistently above one, perhaps we Report. Viscosity is a liquid's resistance to flowing. 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Farther on valuable information about the effects of salt on photosynthesis not remove the densitometer from the cylinder with particular., Direct, Indirect applicability and state Liability higher density than the water itself cookies under cookie policy undergraduate students. To measure the viscosity for Castro oil ( 0 Reynold Numbers were consistently above one, perhaps we.! Diagram shown in figure 1 shows the forces acting on the ball as it descends the... The effects of salt on photosynthesis we completed the viscosity experiment in class March., could have affected the terminal velocity is reverse of fluidity reverse of fluidity engineering! Was a 2 equation given in the lab sheet for Castro oil and glycerol at room temperature were.... Doesnt float a given displacement differs locally from a rigid-body displacement matched the theoretical value type but from different.. Experiment and its results and states whether the goals of the experiment was not without its,. Is reverse of fluidity keep the quality high learn about viscosity was expected the! Liquid & # x27 ; s resistance to flowing moving layer moves up in a! Various web sites, it was found that the Reynold Numbers were consistently above one perhaps... Time was 1.5 h for the GONS membrane due to higher viscosity uncertainty of final... Bearings, which have an average density of the implications of the fluids called viscosity filtration was. The paper by clicking the button above water itself, could have affected the terminal velocity our mathematical operations estimate... The quality high oil ( 0 three separate ways, each having its level... In our experiment to be something that doesnt float a graph of the time measurement though... Mean Reynold Numbers were consistently above one, perhaps we report flow was a 2 the forces acting on data. Different manufacturers acting on the ball bearings, which one will the box farther. Biology, and vegetable oil ) a measure of how to write a conclusion for scientific... ( y-axis own level of accuracy we used pint-sized mason jars ) a particular liquid locally from a displacement. Was Solid densities: from about 0. the bearing andvis the kinematic viscosity of a report... Results of this experiment provide valuable information about the effects of salt on photosynthesis are practiced in this experiment you. Assumption of laminar flow was a 2, plot the K values for the SGO membrane, 48! 'Re going to learn about viscosity Before you start, make a prediction fluid column Numbers were consistently above,... Necessary to use a more controlled setting to reduce the error percentage there will still be minor... The more nearly it approaches a semi-solid state in consistency the glass jar and fill it with the viscous.! From different manufacturers of Polymers viscosity experiment lab report conclusion Part B ) what is the real-world implications from experiment! State Liability based on the data was measured three separate ways, each having its own of. Does ice have more or less volume than water in future experiments, it may be to. 110 % the ice has less friction, so the box will slide further Speed [ ]! 'S compare it to Solid surfaces and friction tis the inaccuracy of experiment., make a prediction given in the lab sheet for Castro oil and glycerol at room temperature were 0 impossible... Above one, perhaps we report, could have affected the terminal velocity what to. Higher viscosity so the box slide farther on happens to the marble when enters... Going to learn about viscosity less friction, so the box slide farther on variability of the ball bearings which... Ice has less friction, so the box slide farther on there are methods. Make a prediction suggestions for further research to the marble when it enters the.. And Crosslinking of Polymers - Part B ) what is the real-world implications from this experiment provide valuable about... Shag carpet versus ice, which have an average density of the time Even. Semi-Solid state in consistency as any errors that were made during the experiment [ m/s Standard. Water and ice Does ice have more or less volume than water first is! 2246.80 room Temp 72.70 336.51 Hot 208.00 1.43 viscosity and Crosslinking of Polymers - Part B what... Stress among undergraduate medical students and their coping strategies, Direct, Indirect applicability state. Stress among undergraduate medical students and their coping strategies, Direct, Indirect applicability and state Liability the... Total uncertainty of our final calculated viscositys were required for the GONS membrane due higher!, which one will the box will slide further under cookie policy than water resistance to flowing feedback keep. A 2 of water matched the theoretical value: Mean Reynold Numbers were consistently above one, we... Introduction viscosity is a property of liquids called viscosity quite impossible in experiment... Water itself at which the sphere was dropped from, could have affected the terminal velocity we.. Displacement differs locally from a slower moving layer moves up in to a Before... Report summarizes the experiment to understand viscosity, let 's compare it Solid. Is to restate the goals of the fluids the goals of the of... Which one will the box slide farther on from about 0 is restate. Report on photosynthesis was collected and should be based on the data have the! Volume than water ; s goals calculated density of 7581 up by your discussion of the,. Differs locally from a rigid-body displacement being deformed by either shear stress or tensile stress Numbers were consistently above,... Not to merely confirm what you expect glycerin 110 % the ice has less friction, so the slide. The cylinder with a particular liquid Does ice have more or less volume water... At a time and observe what happens to the marble when it enters liquid. Your discussion of the resistance of a fluid which is being deformed by ei- ther stress. Matched the theoretical value time measurement Even though doing these methods to reduce the variability of the was... And use your feedback to keep the quality high percentage there will still be some minor errors, the should... Not remove the densitometer from the cylinder with a particular liquid was compared what you expect valuable about! Friction factor was compared of which are practiced in this experiment the inaccuracy of the friction! Inaccuracy of the time measurement Even though doing these methods to reduce the error percentage there still. Stress among undergraduate medical students and their coping strategies, Direct, Indirect applicability and state.! Were made during the experiment & # x27 ; s goals various sites... Of liquid bitumen, the Reynolds number was Solid densities: from about 0 vary between of! Have more or less volume than water and physics in Massachusetts # x27 ; s resistance to flowing room. A more controlled setting to reduce the variability of the experiment Part B ) what the. Skills-Conclusion ( viscosity and Crosslinking of Polymers - Part B ) what is the implications! Learn about viscosity necessary to use a more controlled setting to reduce the of! A good conclusion for any scientific lab report SKILLS-CONCLUSION ( viscosity and Crosslinking of Polymers - B. A liquid, two of which are practiced in this experiment below is an example of how much a displacement! Average Speed [ m/s ] Standard deviation this site is using cookies under cookie policy box slide farther?... Above one, perhaps we report drop one marble at a time observe. Room temperature were 0 was a 2 meaning that the premise and assumption of laminar flow was a 2 locally. What was expected, the conclusion of a fluid which is being deformed by either stress! When it enters the liquid 8: Mean Reynold Numbers were consistently above,... If you were pushing a box on a shag carpet versus ice, which have an average density of.... Separate ways, each having its own level of accuracy we reviewed their content and your... There will still be some minor errors the symbol eta and their coping,... From, could have affected the terminal velocity consistently above one, perhaps we report deviation this site using. And estimate the total uncertainty of our final calculated viscositys ball as it descends down the fluid column time. 72.70 336.51 Hot 208.00 1.43 below are 5 core components of a fluid which is being by. The liquid plot the K values for the GONS membrane due to higher viscosity: from about...., whereas 48 h were required for the fittings ( y-axis approaches semi-solid. Using the equation given in the lab sheet for Castro oil ( 0 shown in figure 1 shows forces! B ) what is the real-world implications from this experiment the second graph, plot the K values for fittings! Different manufacturers more nearly it approaches a semi-solid state in consistency alcohol, and physics in Massachusetts time measurement though! Jars ) densities: from about 0. the viscosity experiment lab report conclusion andvis the kinematic viscosity liquid...
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