he oscillates the spring back and forth to produce a "simple harmonic motion" of periodic motion, which is packaged as a bridge where Alice jumps down the rabbit hole. Zhu Qingqi said that because some people really put forward the concept of "gravity train" in those days: suppose a hole is drilled in the earth and a tunnel is formed through the center of the earth. Because of the size of the earth and the acceleration of gravity, this train is the fastest It only takes 42 minutes to reach the other side of the world. There is also the scene of the playing card gardener planting roses, "The numbers on the gardener are 2, 5, and 7. The prime numbers less than 10 are 2, 3, 5, and 7. Why is 3 missing?

The stalk that the author buried here is 2+5+7=14, 14×3=42.” It was another Easter egg without a trace, which impressed Zhu Qingqi. Zhu Qingqi went on to mention her favorite example. In the story, Alice eats a mushroom and turns into a giant. Her neck **sms services** becomes very long, and it is taller than a tree. There is a nest of bird eggs on the tree. A dove flew towards her, flapping her wildly with its wings. "Snake!" the pigeon screamed. "I'm not a snake! I'm a little girl," Alice said earnestly. "You don't have to deny it, I guess what you're going to say next, you've never eaten eggs!" said the pigeon. "I did eat eggs, but little girls eat as many eggs as snakes,"

Alice explained. "I don't believe that a little girl is also a kind of snake," Dove said. Zhu Qingqi said: "This dialogue is what we often say if P then Q is true, but it does not mean that if Q is true, then P is also true." The short dialogue is a classic proposition in logic, that is, the "premise" is true, " The basic logical inference that can only be established. In this way, wonderful fairy tales revolved in Zhu Qingqi's mind, brewing a scientific adventure. Photo Credit: Huang Shiru Rabbit Holes, Caterpillars, and the Disappearing Cheshire Cat In this exhibition full of scientific knowledge and the fun of fairy tales, Zhu Qingqi selected the funny plots in the stories and planned "Alice fell into the rabbit hole", "