A circular loop of wire with area A lies in the xy-plane. As viewed along the z-axis looking in the −z-direction toward the origin, a current I is circulating clockwise around the loop. The torque produced by an external magnetic field B is given by τ = D (5i^ - 2j^), where D is a positive constant, and for this orientation of the loop the magnetic potential energy U = −μ * B is negative. The magnitude of the magnetic field is B0 = 13D/IA.
A) Determine the vector magnetic moment of the current loop.
B) Determine the component Bx of B.
C) Determine the component By of B.

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

Newtons laws of motion

This question is incomplete and not physics but i'm  willing to if you can give a better question