A circular piece of filter paper is folded into quadrants before it is inserted into a conical funnel. The volume of the folded filter paper depends on the filter paper's diameter.
Diameter in cm
Volume in mL
9 cm
15 mL
11 cm
20 mL
12.5 cm
35 mL
15 cm
75 mL
18.5 cm
135 mL
24 cm
300 mL
If this data is analyzed in Minitab, the following formulas are derived:
volume in mL =
= (1.082 * ((diameter in cm)^2)) - (16.62 * (diameter in cm)) + 75.21
volume in mL =
= (0.00157 * ((diameter in cm)^3)) + (1.005 * ((diameter in cm)^2)) - (15.43 * (diameter in cm)) + 69.4
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