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 +8.6 µC and -8.6 µC charge, respectively. The particles are 2 cm apart. What is the magnitude of the Coulomb force between them?

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 +8.6 µC and -8.6 µC charge, respectively. The particles are 2 cm apart. What is the magnitude of the Coulomb force between them?