You are attempting to row across a stream in your rowboat. Your paddling speed relative to still water is 3.0 m/s (i. e., if you were to paddle in water without a current, you would move with a speed of 3.0 m/s ). You head off by rowing directly north, across the stream.
Assume that the stream flows east at 4.0 m/s, determine how far downstream of your starting point you will finally reach the opposite shore if the stream is 6.0 meters wide.

8 m

Explanation:

Vertical component of the speed of the boat = 3.0 m/s

horizontal  component of the boat = 4 m/s

the rowboat traveled the length of the river which = 6.0 m

time taken to travel across the 6 m wide river = 6 m / 3 m/s = 2 s

the distance far downstream of the starting point = horizontal speed × time = 4 m/s × 2 = 8 m

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)