Two small beads having positive charges q1 = 3q and q2 = q are fixed at the opposite ends of a horizontal insulating rod of length d = 1.50m. The bead with charge q1 is at the origin. as shown in figure p23.11, a third small, charged bead is free to slide on the rod. (a) at what position x is the third bead in equilibrium? (b) can the equilibrium be stable?

q1 q2
+O+ x
|<x-->|
|<d>|

thats what the picture looks like lol! The + sign is a ball with a positive sign in the middle. And the O is a ball and doesnt show a + or a -

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?