Doubling the radius of the pores in a microporous mem brane should affect pressure-driven flow by
A) Increasing it to 2X its previous value
B) Increasing it to 4X its previous value
C) Increasing it to 8X its previous value
D) Increasing it to16X its previous value
E) Increasing it to 32X its previous value

Question

Quizplus · Accepted Answer

The flow through a membrane is proportional to the fourth power of the pore radius (Hagen-Poiseuille equation), so doubling the radius increases the flow by 2^4 = 16 times.

Doubling the Radius of the Pores in a Microporous Mem