Math diary, why do the water drops have a round rhyme? You should start and end. Don't ask Du Niang ... I have offered many rewards. I must write it well. 2.
Why water drops are round in water is simply the symmetry of matter. Since all points on the plane are the same, water ripples will spread around the points. Why don't you stretch out into a ball, you know, because of gravity. Why the pattern of water is not a circle, but a layer of ripples that spread outward as simple harmonic motion, which involves deep mechanical knowledge. Will be described in the physical and mathematical methods of the university.