1. Discuss what Gauss's law is and its relationship with symmetry. Start by defining what flux is and how it is related to area. 2. Two equal and opposite charges of magnitude Q are located on the x-axis at the points +a and -a, as shown below. What is the net flux due to these charges through a square surface of side 2a that lies in the yz-plane and is centered at the origin? (Hint: Determine the flux due to each charge separately, then use the principle of superposition. You may be able to make a symmetry argument.) X