Assume that the drag force for a fish in water depends only on the typical length scale of the fish R, its velocity v, and the density of water \rho. A pufferfish is about 10 \mathrm{~cm} in length and swims at about 5 \mathrm{~m} / \mathrm{s}. How fast does a clown fish, about 1 \mathrm{~cm} in length, need to swim such that it experiences the same drag force as the pufferfish?
Answer Choices
A. 5 \mathrm{~m} / \mathrm{s}
B. 16 \mathrm{~m} / \mathrm{s}
C. 50 \mathrm{~m} / \mathrm{s}
D. 500 \mathrm{~m} / \mathrm{s}
E. 2500 \mathrm{~m} / \mathrm{s}