The angular velocity of a process control motor is (13−12t2) rad/s, where t is in seconds. part a at what time does the motor reverse direction? express your answer to two significant figures and include the appropriate units. tt = nothing nothing request answer part b through what angle does the motor turn between t =0 s and the instant at which it reverses direction? express your answer to two significant figures and include the appropriate units. δθδ θ = nothing nothing request answer

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b. b. at twice the distance, the magnitude of the field is 2b. c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.