Alayer of small rock and mineral particles can provide a surface for plant growth. plants can eventually grow to cover the surface while their roots spread out beneath the surface. which natural process can most likely be reduced or prevented by the introduction of such plant growth?

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.