The table below shows the right ascensions of two stars at a location. star 1 - 4 right ascension (in hour) star 2 - 3 right ascension (in hour) which of these statements is correct about the stars? 1) star 1 will rise 1 hour before star 2 2) star 1 will rise three hours before star 2 3) star 1 will cross the meridian four hours before star 2 4) star 1 will cross the meridian seven hours before star 2

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.