PHY 2020 Lab 09 - Fluid Flow-2

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Chattanooga State Community College *

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MISC

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Physics

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Feb 20, 2024

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docx

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Physics 2020 --- Lab 09 Fluid Flow Materials Needed: Computer Course Objectives: 1. Define the equations for the statics and dynamics of fluids. Activity #1: Proceed to: https://phet.colorado.edu/sims/cheerpj/fluid-pressure-and-flow/latest/fluid-pressure-and- flow.html?simulation=fluid-pressure-and-flow Once the simulation is up and running, you should see something like this. 1

Lab Setup 1. Click the “Pressure” tab (of Pressure, Flow, and Water Tower) to begin Part 1 of the lab. In Part 2 of the lab, you will select the “Flow” tab. 2. Click and drag the pressure gauge to determine fluid pressure (see image on page 1). Also, click the checkbox to activate the ruler that you can use to measure the fluid depth. You can adjust the density of the fluid using the sliding scale on the lower, right-hand side of the window. If need to refresh any changes you have made, each tab will have a “Reset All” button: 3. Answer the questions in the spaces provided below. Lab Procedure: Part 1 1. First, theoretically predict the difference in gauge pressure for water between at a depth of one meter below the surface of the fluid (relative to the fluid’s surface). Show all your work for any credit. The theoretical difference in the gauge pressure for water between the depth and the surface of the water is 9,800 2. Perform the simulation. Click and drag the pressure gauge and activate the ruler (similar to the image on page 1) and measure the pressure at a depth of 1 meter below the surface of the water. Record the pressure difference in the space below. The pressure difference is 9.754kPa 3. The pressure gauge in this simulation shows the absolute pressure. Keeping this is mind, compare your simulated pressure differences from parts 2 and 1. Are your results the same or different? If your results are different, provide a brief explanation for the cause. The results for the first and second question are different. 4. Next, click the “Reset All” button. Now, raise the density of the fluid by sliding the density adjustment bar all the right to the “honey” setting. Click and drag the pressure gauge and activate the ruler (similar to the image on page 1) and measure the pressure at a depth of 1 meter below the surface of the water. Record the pressure difference in the space below. The pressure difference is 13.852kPa 2

5. Compare your results from question 4. to your result from question 2. Use the principle Δ P = ρ ⋅ g ⋅ Δh , to describe any observable difference, if you observe one. 6. As shown in the image below, use the slider to open the spigot on the faucet to fill up the water tank: Click the check box to activate the “Grid” and click and drag to activate the pressure gauge. In the space below, describe whether you predict the pressure difference from 0 meter to 1 meter of depth will be the same as the pressure difference between the 2m and 3m marks below the surface. Note: Though the grid is inactive in the image above, you can see the grid lines in the image on page 1. The pressure difference between the 0 m and 1 m marks will be less than the pressure difference between the 2 m and 3 m marks when measuring pressure in a fluid like water. 7. Using the pressure gauge, perform the simulation. Is the pressure difference between the 0m and 1m marks the same or different than the pressure difference between the 2m and 3m marks? 3

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