You are standing a distance x from a sound source. By how much does the decibel level change if you move to distance 3x from the source? A -5.00 C point charge (Q1) is placed at the center of a conducting spherical shell with inner radius a and outer radius b. A total of +3.00 C charge(Q2) is placed on the conducting shell itself. What is the total charge on the outer surface of the conducting shell?