College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Question

I need help with number 9 please, using one of the questions. Thank you in advance.

8. What is the distance between two charges, +7.8 µC and +9.2 µC, if they exert a force of 4.5 mN on each other? 9. A –4.2 µC charge exerts an attractive force of 1.8 mN on a second charge which is a distance of 2.4 m away. What is the magnitude and sign of the second charge? 10. Two equal negative point charges repel each other with a force of 18.0 mN. What is the charge on each object if the distance between them is 9.00 cm? How many extra electrons are on each object? 11. Two charged conducting spheres have net charges of +4.0 µC and -8.0 µC and attract each other with a force of 16 mN. The spheres are brought into contact and then moved apart to the initial distance. What is the new force between the spheres? Is this force attractive or repulsive? 12. What is the ratio of the electrostatic force to the gravitational force between two electrons?
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Transcribed Image Text:8. What is the distance between two charges, +7.8 µC and +9.2 µC, if they exert a force of 4.5 mN on each other? 9. A –4.2 µC charge exerts an attractive force of 1.8 mN on a second charge which is a distance of 2.4 m away. What is the magnitude and sign of the second charge? 10. Two equal negative point charges repel each other with a force of 18.0 mN. What is the charge on each object if the distance between them is 9.00 cm? How many extra electrons are on each object? 11. Two charged conducting spheres have net charges of +4.0 µC and -8.0 µC and attract each other with a force of 16 mN. The spheres are brought into contact and then moved apart to the initial distance. What is the new force between the spheres? Is this force attractive or repulsive? 12. What is the ratio of the electrostatic force to the gravitational force between two electrons?
solving for sulving forg salving forr fer2 82 8. 2. K=9x10? N-m² Craig Meeks 31 ace
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Transcribed Image Text:solving for sulving forg salving forr fer2 82 8. 2. K=9x10? N-m² Craig Meeks 31 ace
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