Estimate the minimum fluidization velocity for a bed of particles fluidized by water. Take do $120$m$,0,1\mathrm{.}0,$ P$-2500$ kg$/$m$^3,$ Cmt $0\mathrm{.}45,$ p$=1000$

kg$/$m$^3,-0\mathrm{.}9$ m Pa$.$s

Also calculate the bed voidage, e and the ratio of the height of the fluidized bed to that of the fixed bed for us$/$um$=10$