QUESTION $1.(12$ Marks$)$

Stoke's Law shown below governs the factors that affect the separation of free oil from water.

$VR=\frac{2(p-p_o)g}{9n}(\frac{d}{2}{)}^2$

a$.$ Outline $($Identify$)$ the variables represented in Stoke's Law.

$(3$ marks$)$

$VR=$

$(p-p_0)-$

$N=$

$G=$

$d=$

b$.$ Given the following:

#$6$ Fuel Oil SG $=0\mathrm{.}95$

#$8$ Fuel Oil SG $=0\mathrm{.}8$

Water SG $=1\mathrm{.}0$

Determine which fuel will rise faster in water and how much faster will it rise.

$(3$ marks$)$

c$.$ "Oil Droplets in Water at $40$ Degrees Fahrenheit will Rise at Half the Rate of Oil Droplets in Water at $90$ Degrees Fahrenheit." Explain why this is so$.$

$(2$ marks$)$

d$.$ What can one conclude from the data in the table below?

$(2$ marks$)$

Time Required for an Oil Droplet to

Rise Three Feet @ $68$ Degrees F

SG $=0\mathrm{.}85$

Droplet Size Rise Time

$m(Hr$:Min:Sec$)$

$\backslash$table$[[300,0$:$00$:$12$