M3.7 Laboratory Report 9 Worksheet

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Broward College *

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2053L

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Mechanical Engineering

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Dec 6, 2023

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docx

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Name: __________________________________________ M3.7 Laboratory Report 9 Worksheet PhET Simulation: Under Pressure Instructions Before you start to work on this worksheet, review the M3.7 Laboratory Report 9 Instructions Submit your completed work to the M3.7 Laboratory Report 9 dropbox. See the Schedule and Course Rubrics in the Syllabus Module for due dates and grading information. Objectives: 1. Determine the relationship between pressure and depth. 2. Determine the relationship between pressure and density. 3. Determine the density of an unknown fluid. Pre-Lab Activities: 1. Open the simulation using the link to PhET Interactive Simulations at the University of Colorado Boulder: https://phet.colorado.edu/sims/html/under-pressure/latest/under-pressure_en.html 2. Explore the options available in the simulator
Part I: Constant density, Changing depth 1. Push the big Play arrow. Start with the default settings. In addition, fill the tank with water and select “Ruler”, like the diagram to the right. 2. Click on the pressure gauge to move it toward the water. Measure the pressure in the water at every 0.50 m from the surface to the bottom. Record your results on the table below. Note that the simulation will give you kPa. Convert to Pa before entering the values on the table. Depth (m) Pressure (Pa = N/m 2 ) 0 . 5 0 106, 652 Pa 1 . 0 0 111, 608 Pa 1 . 5 0 116, 563 Pa 2 . 0 0 121, 519 Pa 2 126,
. 5 0 243 Pa 3 . 0 0 130, 623 Pa 3. Use Vernier Graphical Analysis to plot the graph of pressure vs depth. 4. Insert your graph in the completed laboratory report and discuss on the physical meaning of the slope and the y-intercept. Part I: Constant depth, Changing density 1. Now, pick a depth and vary the fluid density from 700 to 1,400 kg/m 3 . Record your results on the table below. Note that the simulation will give you kPa. Convert to Pa before entering the values on the table. Chosen depth: 2 m . Density (kg/m 3 ) Pressure (Pa = N/m 2 ) 950 120,818 1000 121,634 1050 122,649 1100 123,665 1150 124,680 1200 125,696 2. Plot a graph of pressure vs density. Similarly describe the physical meaning of the slope and the y-intercept. Part III: Mystery Density 1. Click on the icon with the question mark on the sink to access the mystery fluid portion. 2. Determine the density of a mystery fluids A, B and C. 3. Describe your method and results in your completed laboratory report.
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Fluid A : Density (ρ) = Pressure (P) / (gravity (g) x height (h)) Density (ρ) = 125,680 Pa / (9.8 m/s² x 1.5 meters) Density (ρ) ≈ 8,560.54 kg/m³ Fluid B: Density (ρ) = Pressure (P) / (gravity (g) x height (h)) Density (ρ) = 113,374 Pa / (9.8 m/s² x 1.5 meters) Density (ρ) ≈ 7,704.57 kg/m³ Fluid C: Density (ρ) = Pressure (P) / (gravity (g) x height (h)) Density (ρ) = 117,097 Pa / (9.8 m/s² x 1.5 meters) Density (ρ) ≈ 7,956.78 kg/m³