Discussion
Applying the Deutsch-Anderson equation with a migration velocity of \( 0.10 \) m/s, a plate area of \( 4000 \) m\(^2\) and a flow of \( 100 \) m\(^3\)/s gives an efficiency of
Answer: D
The exponent is \( -Aw/Q = -4000 \times 0.10/100 = -4 \), and \( 1 - e^{-4} = 0.982 \). Because the relationship is exponential, raising the efficiency to 99.5 per cent would require more than a third as much plate area again.
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