Question: Physics Essay (500 words or more for testing and demonstration 1 physical signs in life) The best answer to other questions: The bamboo basket is actually not empty-for example, the tension of water molecules often says "the bamboo basket is empty". If you are careful, you will find that the bamboo basket is actually not empty: at the bottom of the bamboo basket and the empty space around it, we understand that countless water films are filled. The molecules that make up things are not only moving endlessly, but also attracting and repelling each other. In a fine environment, the attraction between molecules equals repulsion. If the interval d between molecules is set as the equilibrium interval at this time, when the interval between molecules is slightly larger than the equilibrium interval, the force between molecules will be reflected as gravitational force (if it is larger than the molecular diameter by 10 times, there is almost no gravitational force between molecules). When the interval between molecules is less than the equilibrium interval, the force between molecules is reflected in the repulsion of gravity. When the bamboo basket is immersed in water, because the bamboo stick has attractive effect on water molecules, the distance between the teeth and the water molecules in the gap between the bamboo basket becomes larger, and the force between molecules is reflected in gravity, forming countless water films. Any water surface has a water film. This is because some fast-moving molecules on the water surface keep running into the air. The distance between water molecules becomes larger, and the attraction between molecules is greater than the repulsion, thus forming a thin and elastic "skin" on the water surface for the said pulling force, which is one of the reasons why many light insects can walk freely on the water surface. It is said that the apparent pulling force of this set is really not small, which is enough to make some light molecular composite plastic rice baskets float on the water without sinking, but if a part of the water film is crushed, other departments will move under the action of gravity. For example, the 65,438+0 paddle will be made by cutting and coring with a wooden graphite pen, inserting wax oil into a hole drilled in the back of the boat, and putting the paddle on the water. This is because the wax oil in contact with water will crush the tension of the water surface, which will naturally reduce the tension of the water surface in this department, so the ship will move towards the target with greater tension. Otherwise, wax oil molecules will inevitably move because of side reasons. Because the action of force is mutual, it also breeds the force that urges the ship to move forward. You see, the world is cold and the bamboo basket is not empty. Really care about physics everywhere. Let's enjoy this wonderful world with scientific eyes all the way!