Upon entering the room, you observe two balloons suspended from the ceiling. You notice that instead of hanging straight down vertically, the balloons seems to be repelling each other. You can conclusively say ... a. both balloons have a negative charge. b. both balloons have a positive charge. c. one balloon is charge positively and the other negatively. d. both balloons are charged with the same type of charge. Explain your answer.

Four equal charges (all +q) are placed on the corners of asquare with side length a.   a.)  Find an algebraic expression for the magnitude of theelectric force felt by the charge in the lower left-hand corner(circled) due to the other charges. b.) Make a sketch of the electric field lines associated with this charge distribution. Be sure to draw linesboth inside and outside the square.

3. A 7.17 nC charge is located 1.66 m from a 4.42 nC point charge. a. What is the magnitude of the electrostatic force that the 7.17 nC charge exerts on the 4.42 nC charge? b. What is the magnitude of the electrostatic force that the 4.42 nC charge exerts on the 7.17 nC charge? C. Are these forces attractive or repulsive?

Consider the following sequence of events: 1. You rub a glass stirring rod with a silk cloth, giving the glass rod a positive charge. 2. Your friend holds an aluminum measuring cup in her bare hand, touching the metal. 3. Your friend puts the aluminum cup down on a rubber mat. 4. You bring the glass rod near the right side of the aluminum cup, but not close enough to touch. 5. While you hold the glass rod near the right side of the aluminum cup, your friend touches the left side of the cup with her finger, then moves her finger away. 6. You move the glass rod away from the cup. Which statements about the process are true? O In step 4, protons flow from the aluminum cup onto the rubber mat. O At the end of step 2 the cup may have been strongly charged. O After step 6, the aluminum cup has a net negative charge. O Since the glass rod does not touch the cup in steps 4 thorough 6, the cup is still neutral after step 6. O At the end of step 4 the aluminum cup is polarized. O In step 5…