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CopyofElectrostaticsLesson05

# CopyofElectrostaticsLesson05 - Lesson5: 5.1FindaPattern...

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Lesson 5: What Determines the Strength of Electrostatic Interaction? 5.1 Find a Pattern Charles Coulomb used a torsion balance to measure the force that one charged sphere exerts on another charged sphere to find how the force between two electrically charged objects depends on the magnitudes of the two charged objects and on their separation. Coulomb could not measure the absolute magnitude of the electric charge on the metal spheres. However, he could divide the charge in half by touching a charged metal sphere with an identical uncharged metal sphere. a. Explain the mechanism behind his method of dividing the charge. Why did he have to use metal spheres? Would the foam spheres work? b. The table below provides data that resembles what Coulomb might have collected. Find patterns in the data and devise a mathematical relationship based on these observations. Use graph paper to help (hint: you need to make 3 graphs). Remember to decide which variables are independent and which variable is the dependent. Then examine the dependent variable as you change only

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