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A magnetic dipole with a dipole moment of magnitude0.016 J/T is released from rest in auniform magnetic field of magnitude 58mT. The rotation of the dipole due to the magnetic force on it isunimpeded. When the dipole rotates through the orientation whereits dipole moment is aligned with the magnetic field, its kineticenergy is 0.70 mJ.

(a) What is the initial angle between the dipole momentand the magnetic field?

°
(b) What is the angle when the dipole is next (momentarily) atrest?

°

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