I didn't know roundness until I was exposed to geometric tolerances. Degree is a very commonly used word. There are a lot of words like angle, force, quarter, extreme, or variables like density, solubility, degrees of freedom, symmetry, etc. As you can see from the name, roundness is related to circles. How round is the surface of an object? Roundness is the measure. Roundness is to judge whether the product is really close to the round shape during production and processing, or it should be said that it is not visible to the naked eye. For example, the lid of mineral water needs to see whether the roundness is sufficient. In fact, roundness does not really reflect the degree of roundness of the surface of an object. Because it is said that the difference between the maximum radius and the minimum radius of the surface of an object is zero, then the roundness of the object is extremely poor. At that time, wasn't that a roundness of 1? In probability, an event with probability 1 is bound to occur. In the Internet, some short videos are often predicted by inevitable events. As a result, the natural prediction is correct. What is this called, correct nonsense. If you ask him to say whether your offspring is male or female, he will naturally be confident in saying that it is male or female. What does it mean that the difference between the maximum radius and the minimum radius is zero? We thought it was round. Of course, here, it should be said that it is perfectly round. This is what we usually call a circle. Since there is no other case, it is still referred to as a circle. Actually, we ignore a situation. That is, objects have a lot of fractals. And the radii of these fractals are all equal

When we talk about roundness, we have to mention parallelism and flatness. A circle is a geometric figure, however, its face is not a surface but a plane. In a circle, it is possible to find two parallel strings. So it's related to parallelism. It can be said that the three of them are entangled with each other. You have me, I have you. We know that by extending the circular surface in all directions, we can get a flat surface. It can be said that the circle is a part of the plane. Unlike a flat surface, a circle has a border. We know that if the difference between the maximum radius and the minimum radius is zero, it can cause more parallelism. However, this reduces the flatness considerably. A high degree of flatness necessarily corresponds to a high degree of parallelism, but a high degree of parallelism does not necessarily correspond to a high degree of flatness. Since the circle is part of the plane, is the roundness of the plane higher? No. As mentioned earlier, a circle has a border, so it should not be confused with a plane. Mizukawa said.

The three of them couldn't put down the physics house, so they had a video conversation with Mizukawa Mi.

You say that objects have temperature nodes like melting point and boiling point. Is it possible that when the object is at a higher temperature, there will be no visible change? I don't think so. I think there may be some temperature nodes that correspond to some states and properties. Margarita said.

We know that concentration is a measure of the amount of liquid when it enters another, so why is the concentration of some liquids zero? That is, why does the phenomenon of dispensing occur? According to the principle of similarity dissolution, it is likely that the chemical properties of the two liquids are completely different. Liuzifeng said.

Degree is a Buddhist term, and it focuses on guidance. For all sentient beings, it is inevitable that there will be times when they are lost. That's where guidance comes in. I think so. In life, how can there be ups and downs and tribulations? It is natural to be confused and helpless for a while. That's why I usually read a lot of philosophy books. After reading it, I don't feel empty. Duenas said.

Look, the lotus blossom in the water is blooming. Let's go and see the lotus flowers. Mizukawa said.