An outside loudspeaker (considered a small source) emits sound waves with a power output of 104 w. (a) find the intensity 10.8 m from the source. w/m2 (b) find the intensity level in decibels at that distance. db (c) at what distance would you experience the sound at the threshold of pain, 120 db? m

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.