Exercise $2$:

The size distribution of $35kg$ crushed rocks has been analyzed using sieving method. The results of the sieving process are tabulated in the next table $($standard mesh$).$ The density of the particle is $1550k\frac{g}{m^3}$ and the shape factor are $a=0\mathrm{.}8$ and $=0\mathrm{.}65,$ Calculate:

a$)$ The specific area of particles $($Aw$)(m\frac{m^2}{g})$ for the material between $4-$mesh and pan.

b$)$ Number of particles in mixture $($Nw$)($particles$/$g$)$ for the material between $4-$mesh and pan

c$)$ What fraction of the total number of particles in the $\frac{150}{200}$ mesh increment?

d$)$ If $95\%$ of the crushed glass must have size less than $1\mathrm{.}25mm,$ please state whether or not the particles need to be crushed again?

e$)$ What is the apperture diameter Dpi of up to about $80\%$ of

$\backslash$table$[[$Mesh$,\backslash$table$[[$Mass fraction$],[$retained$,x_i$