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PhET Static Electricity Lab Assignment Part A: In this section you will compare calculated (using Coulomb equation) electric force values between electric charges with values obtained from a simulation. First, we are going to calculated electric force values using Coulomb equation. 1. Calculate electric force (Coulomb force) between two + 8 uC charges separated by 10 cm. Use F = k 41042 where k = 8.99 x 109 Nm2C-2 Show your work clearly, under "Data Analysis" section in the lab report. 2. Calculate electric force (Coulomb force) between an 8 uC charge and a - 8 UC charge separated by 10 cm. Use F = klgill92l where k = 8.99 x 109 Nm2C-2 Show your work clearly, under "Data Analysis" section in the lab report. 3. What would be the electric force between the above 8 JC charge and - 8 UC charge if they were moved so that the distance between them was reduced by half? (from 10 cm to 5 cm). Can you answer the question without using Coulomb equation? 4. Calculate electric force (Coulomb force) between a 5 JC charge and a - 4 JC charge separated by 6 cm. Use F = 191 142 where k = 8.99 x 109 Nm2C-2 Show your work clearly, under "Data Analysis" section in the lab report. 5. Now we are going to simulate scenarios in steps 1-4. Go to the https://phet.colorado. edu/sims/html/coulombs-law/latest/coulombs-law en.html PhET simulation. 6. Select "Macro Scale" option. 7. Check "Force Values"8. Change Charge 1 and Charge 2 values to + 8 uC. Pull the charges so that the distance between them is 10 cm. Notice that the distance is measured from center to center. 9. The simulation will show the electric force. Take a screenshot and copy it under "Data Analysis" section. Add a description. 10. Repeat for an 8 uC charge and a - 8 uC charge separated by 10 cm, and then for a 5 uC charge and a - 4 uC charge separated by 6 cm. Take screenshots and include in Data Analysis section with appropriate descriptions. 11. Now compare calculated electric force values with simulated force values. Use the following equation. |calculated value Simulated value| Percent difference = W X 100 2 12. The above % difference equation will give you the difference between the calculated force and the simulated force as a percentage. Enter % difference calculations for each case under 'Data Analysis'. 13. If the percentage is less than 10%, the two values agree within the margin of error. If not, we must explain possible experimental errors. This explanation should be in the Discussion. 14. In each case, do your calculated values agree with simulated values? If values agree, mention that in the Discussion. 15. Write the conclusion. Part B: Design a simple experiment to show 1) attraction and 2) repulsion caused by static electricity. Choose two objects to transfer charges by rubbing them together. Once you have a charged object, move it closer to other smaller objects (for example, tiny bits of paper, hair strands) and see if there's an attraction or repulsion. Pick different objects so that you can demonstrate attraction and repulsion. Show the results by using photos. Write a complete lab report for the above experiment