In an NMR experiment, the RF source oscillates at 46 MHz and the magnetic resonance of the hydrogen atoms in the sample being investigated occurs when the external field has magnitude 0.84 T. Assume that the internal and external magnetic fields are both along a z axis, with the external field in the positive direction, and take the proton magnetic moment component , to be 2.96 x 10-2 J/T. What is the z component of the internal magnetic field? Number Units