1. Determine the force between two charges of +40μC and +60μC separated by 20 cm in the air
  2. A +10 μC charge and a -12 μC charge experience an attractive force of -1.44 N (“-” means attractive). Determine their separation distance.
  3. Two electric charged objects float on air has 300 cm distance with each other. And attracted with force 0,1 N. If the charge of one of the object is + 5 μC, determine the charge of other object!
  4. Hydrogen ion and oxygen ion is positioned like picture below:


A. Determine whether they create repelled or attraction force! Explain!
B. Calculate amount of force between them!
C. State two ways to make the force between them become four times bigger!






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