A protein of molar mass $6.0 \times 10^6 \text{g mol}^{-1}$ and density $1.33 \times 10^3 \text{kg m}^{-3}$ is in an ultracentrifuge tube (filled with water) at a distance of 10 cm from the rotation axis. The rotor is spinning at 60000 rpm. What is the centrifugal \"force\" on the protein molecule?
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