MP01c - [ Print View ] PHYS 2212 G/H Spring 2008 MP01c Due...

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[ Print View ] PHYS 2212 G/H Spring 2008 MP01c Due at 9:00am on Tuesday, January 15, 2008 View Grading Details Electric Force This assignment will receive a 30% bonus if it is completed before 9:00 AM, Monday, January 14. Charged Aluminum Spheres Two small aluminum spheres, each of mass 0.0250 kilograms, are separated by 80.0 centimeters. Part A How many electrons does each sphere contain? (The atomic mass of aluminum is 26.982 grams per mole, and its atomic number is 13.) Hint A.1 The definition of mole and atomic number Hint not displayed Part A.2 How many electrons per mole of aluminum? Part not displayed Part A.3 How many electrons per kilogram of aluminum? Part not displayed Express your answer numerically. ANSWER: 7.25 × 10 24 Part B How many electrons would have to be removed from one sphere and added to the other to cause an attractive force between the spheres of magnitude (roughly one ton)? Assume that the spheres may be treated as point charges. Hint B.1 How to approach the problem Use Coulomb's law to find the charge needed to produce the given force. Then use the charge of an electron to determine the number of electrons necessary to produce the calculated charge. Part B.2 Find the relationship between the charges of the spheres Assume that after some electrons have been removed from it, the first sphere ends up with a net charge of . What would be the charge on the other sphere, , after these extra electrons are added to it? Express your answer in terms of and any necessary constants. ANSWER: = Answer not displayed Express your answer numerically. ANSWER: 5.27 × 10 15 Part C What fraction of all the electrons in one of the spheres does this represent? Express your answer numerically. ANSWER: 7.26 × 10 10 PSS 25.1: What's the Point? Learning Goal: To practice Problem-Solving Strategy 25.1 for problems involving electrostatic forces. Two charged particles, with charges and , are located a distance apart on the x axis. A third charged particle, with charge , is placed on the x axis such that the magnitude of the force that charge 1 exerts on charge 3 is equal to the force that charge 2 exerts on charge 3. Find the position of charge 3. Assume that all three charges are positive.
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This note was uploaded on 05/08/2008 for the course PHYSICS 2212 taught by Professor N/a during the Spring '08 term at Georgia Tech.

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MP01c - [ Print View ] PHYS 2212 G/H Spring 2008 MP01c Due...

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