A 12-g coffee fifter is dropped from a height of 3 m above earth's surface. The average radius of the surface of the coffee filter facing the air-drag is 12 cm. Assuming that the density of air is 1.2 kg/m³ and that the filter achieves a terminal speed of 2.3 m/s, calculate the drag coefficient.
A. 0.57
B. 0.69
C. 0.82
D. 0.97
E. None of the ones given here: