Describe at least three ways in which Coulomb’s law is similar to Newton’s law of gravitation....

1. Describe at least three ways in which Coulomb’s law is similar to Newton’s law of gravitation. Discuss at least two ways in which the two laws are different.

2. A charge is placed inside a partially inflated balloon. If the balloon is then further inflated to a larger volume and the associated surface area increases, does the electric flux though the balloon’s surface change? Why or why not?

3. The electron was not discovered until well after the laws of electricity were determined. Protons were discovered even later, so scientists such as Coulomb and Gauss did not know that electric charge is quantized. How do you think that affected their way of thinking about electric phenomena?

4. An ion is released from rest in a region in which the electric field is nonzero. If the ion moves in a direction antiparallel (opposite) to the direction of the electric field, is the ion positively charged or negatively charged?