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Homework Statement
Water relative permitivity is about 81. If the electric field E=x[V/m] (x unit vector) is inside the water, what is the vector P(dipole polarization per unit volume)?
Then
Assume that the density of water is 1000 [kg/m3]
and that there are 3.34 × 1025 molecules per kg of water. (One mole of water weighs 18.0[g] since atomic weight of water is 18.0. A mole contains a number of molecules that is equal to Avogadro number (6.02 × 10^23)).
Determine an average effective dipole moment of each water molecule when E= x [V/m].(x is unit vector)
Note: each molecule of water has dipole moment. The average dipole moment,
however, is zero since these dipole moments are randomly oriented. The average effectivedipole moment px is induced by the applied electric filed because the molecules are preferentially oreinted along the field.
Homework Equations
X = eps - 1 and P=eps0*X*E
P=Nv(p) or P=1/ΔVƩ(p)
The Attempt at a Solution
X=81-1 = 80
And so P=eps080x
From that I would plug into the other equation correct, but i am not sure what to do once i have that plugged in for P and what to plug into for the rest