A boat was heading up the river with a velocity of 45 km/h, N. The river was flowing down into the boat with a velocity of 10 km/h, S. What is the resultant vector of the boat?

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.