5. Charge A is +2.0 X 10-6 C and charge B is +3 X 10-6 C. The charges are 3 m apart. What is the force between them? Is it attractive or repulsive? 6. Charge A is -4.0 X 10-6 C and charge B is +2 X 10-6 C. The charges are 5 m apart. What is the force between them? Is it attractive or repulsive? 7. When the air is dry and you walk on a wool carpet with your shoes, you may experience a shock when you touch a doorknob. Explain what is happening in terms of electric charge. (Hint: Your shoes are similar to the rubber rod.) 8. Compare and contrast Coulomb's Law and Newton's Law of Gravitational Attraction. Provide at least one similarity and one difference. 9. Coulomb's Law states that the electric force between two charged objects decreases as the square of the distance increases. Suppose the original force between two objects is 60 N, and the distance between them is tripled; the new force would be 32, or 9 times weaker. The new force would be 60 N ÷ 9 = 6.7 N or 7 N. Find the new forces if the original distance was:
11. A single electron has a charge of 1.6 X 10-19 C. Show why it takes 6.25 X 10-18 electrons to equal 1 C. 12. How could you depict the invisible electrostatic force in a museum exhibit? |
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