Consider the situation when almost all of the magnetic moments of a sample of a particular ferromagnetic metal are aligned. in this case, the magnetic field can be calculated as the permeability constant μ0 multiplied by the magnetic moment per unit volume. in a sample of iron, for example, where the number density of atoms is approximately 8.50 ✕ 1028 atoms/m3, the magnetic field can reach 1.99 t. if each electron contributes a magnetic moment of 9.27 ✕ 10−24 a · m2 (1 bohr magneton), how many electrons per atom contribute to the saturated field of iron?

2.00976

Explanation:

B = Magnetic field = 1.99 T

= Vacuum permeability =

= Magnetic moment of each electron =

n = Number density of atoms =

N = Number of electrons per atom

Magnetic field is given by

The number of electrons per atom contribute to the saturated field of iron is 2.00976

i believe the answer is a

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min