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In aerodynamics, what does a fluid's viscosity describe?

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  1. How heavy it is
  2. How hot it is
  3. How sticky it is, or how it resists flowing

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References

  1. Boundary Layer, NASA Glenn Beginner's Guide to Aeronautics www1.grc.nasa.gov/beginners-guide-to-aeronautics/boundary-layer Checked 2026-10-10.

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