An ice skater of mass m = 60 kg coasts at a speed of v = 0.8 m/s past a pole. at the distance of closest approach, her center of mass is r1 = 0.45 m from the pole. at that point she grabs hold of the pole.

a. what is the skater's angular speed when she first grabs the pole? rad/s
b. what is the skater's angular speed after she now pulls her center of mass to a distance of r_2 = 0.46 m from the pole? rad/s

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.