A fluid with viscosity n flows through a tube of radius R and length L. A second fluid with viscosity 4n flows through another tube of the same length. The same pressure difference exists across both tubes. What must be the radius of the second tube so that both fluids have the same volume flow rate? Give answer in terms of R. Select one: O a. 2R cross o O b. (1.4) R cross ou O c. (.89) R cross ou O d. 16R Cross ou O e. 8R cross ou Check