Sound travels much faster in water than air. it takes 4.2 seconds for the sound of an explosion to travel underwater to a diver 6,006 m away. what is the speed of sound in water? include correct units with your answer.

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.