Composite or stratovolcanoes often eject tiny particles of dust into the atmosphere causing dust clouds during eruptions. When particles of opposite charge collide, they form a dust aggregate. Two dust particles have a +3.9 µC and −3.9 µC charge, respectively. The particles are 9 cm apart. What is the magnitude of the Coulomb force between them?  ______N

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Composite or stratovolcanoes often eject tiny particles of dust into the atmosphere causing dust clouds during eruptions. When particles of opposite charge collide, they form a dust aggregate. Two dust particles have a +3.9 µC and −3.9 µC charge, respectively. The particles are 9 cm apart. What is the magnitude of the Coulomb force between them?
 ______N

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