Normie Neutron swings a rubber ball attached to a string over his head in a horizontal, circular path. The string is 1.5 m long and the ball makes one complete turn every 0.60 seconds.

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.