A160 kg box is hanging from two strings. string #1 pulls up and left, making an angle of 40o with the horizontal on the left, and string #2 pulls up and to the right, making an angle of 70o with the horizontal on the right. find the tension in string #2 (on the right side)

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.