Estimate the number of hydrogen nuclei in human brain. Suppose that an MRI medical diagnostic machine applies a static magnetic field of 2T to the brain, at room temperature. Classically, how much more likely is it that the magnetic momer of a hydrogen nuclei magnetic moment is aligned with this field than anti-aligned with it? In the brain under these conditions, on average, how many more hydrogen nuclei are present that have their spins aligned with the field, than those that have their spins anti-aligned with it