1. The noise of a construction site can be heard at a distance of 11.0 km. Assuming sound is emitted equally in all directions and the threshold of audibility is 1.0 x 10^-12 W/m^2, find the sound power emitted from the construction site in mW.

2. 5 capacitors connected to a potential difference Vab as shown in the figure. The dielectric strength of the dielectric materials used allows a maximum voltage of 35.0 V for each capacitor. What is the maximum possible value of Vab that will not damage capacitors?