If chris drives 27 km n and then 40 km e , what is the distance and displacement

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.)

an energy transformation flow diagram is shown

where is it ?