1. In a classroom demo, the dome of a Van de Graaff generator was initially charged negatively. A stream of closely spaced neutral soap bubbles was blown toward the dome of the generator. Much to the surprise of the students, the following observations were made: 1. The bubbles were initially attracted to the dome 0':- until the first bubble hit the dome. o O ' 2. The first bubble hit the dome and splattered , ' 0 3. All the other bubbles stopped in mid-air before repelling from the dome of the generator and from each other. Using the concepts of electrostatic forces and charge distribution, explain: 0 Why the soap bubbles were initially attracted to the top of the generator. (2 marks) 0 Why, after the first bubble splattered, the other bubbles were repelled away from one another. (2 marks) A diagram or diagrams may be used to help you communicate your idea. 2. A single neutral 2.00 g pithball is touched by a charged rubber rod which had a charge of 2.3 x 10'H C. The pithball then comes into contact with another pithball of equal size and shape. If the two pithballs are hung by two pieces of 3.00 cm thread from a single point (as shown) forming an angle of 15.0\