Ethanol has volume susceptibility and density

PHYSICS · Subjective · Fermi University Physics · Electricity, Magnetism & Electromagnetism · Magnetic materials · Magnetic materials

The Boundary-Value Problem, Ch Diamagnetism, paramagnetism and magnetic susceptibility

Problem

Ethanol has volume susceptibility

\chi_m=-1.03\times10^{-5}

and density

\rho_m=789\,\mathrm{kg\,m^{-3}}

. Find the value of

B\,dB/dz

required to levitate a droplet of ethanol against gravity, taking

g=9.8\,\mathrm{m\,s^{-2}}