A stream moving with a speed of 0.9 m/s reaches a point where the cross-sectional area of the stream decreases to one-third of the original area. What is the water speed in this narrowed portion of the stream

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.