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<p>Most of us use a blender without giving thought to how they do the job of cutting food down to size. You might assume that the fast spinning blades cut the food directly. But blenders have a secret. Cutting is only important for the first stage of blending. Once the bits of become small and begin to flow, unseen forces come into play. After you watch this video, be sure to see <a href="https://www.chefsteps.com/guides-tools/the-physics-of-blending-cavitation">part 2</a> for the physics of cavitation.</p>