The brakes on your automobile are capable of creating a deceleration of 5.5 m/s^2. if you are going 143 km/h and suddenly see a state trooper, what is the minimum time in which you can get your car under the 97 km/h speed limit? (the answer reveals the futility of braking to keep your high speed from being detected with a radar or laser gun.)

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.