Part A Given water's dipole moment of 6.17×10−30C⋅m6.17×10−30C·m, what's the energy change when a water molecule, with its dipole moment initially opposite a 3.52-kN/CkN/C electric field, swings to align with the field?

The earth's magnetic field, with a magnetic dipole moment of 8.0×1022am2, is generated by currents within the molten iron of the earth's outer core. suppose we model the core current as a 3000-km-diameter current loop made from a 1000-km-diameter “wire.” the loop diameter is measured from the centers of this very fat wire.to decide whether this is a large or a small current density, compare it to the current density of a 7.0 a current in a 2.0-mm-diameter wire.