If the displacement, velocity and acceleration at an instant of a particle describing S. H.M are respectively 7.5m, 7.5m/s, 7.5m/s?. Calculate the
maximum velocity of the particle.

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.