Every night I turn on the tape recorder to listen to English words. This Wednesday, my schoolbag was on the table. I turned on the tape recorder to listen to English words as usual. The sound from the tape recorder is not crisp and pleasant, but hoarse and ugly! So I asked my father to see if there was anything wrong with the tape recorder. Strangely, there is nothing wrong with the recording and the tape! Is there something wrong with my ears? No, it won't. That must be a tape recorder! But why is the recording machine noisy? Was it bad before? Why is there noise on the recording machine this day? Dad said, "Did you put a magnet next to the tape recorder?" I suddenly realized that there was a magnet on my schoolbag. Why does the magnet make noise when it is placed next to the tape recorder?
For this problem, I looked up a lot of information, and I found that the tape of the tape recorder is coated with special magnetic powder. When recording, the tape recorder converts sound waves of different intensities into magnetic signals. When we listen to English words, this magnetic signal becomes sound waves. In this way, we can hear the sound recorded on the tape. If the magnetic tape is close to the magnet, the signal of magnetic field will attach to the magnetic tape, and the magnetic signal on the magnetic tape will change, which is different from the original magnetic signal, thus forming noise.
Is that really the case? We can't believe everything in the data. We have to experiment with our own hands to reach a conclusion. The experimental tools are: a big magnet, a tape recorder and a complete tape. I'll put the tape in the tape recorder for a few minutes, and then put the magnet next to the tape recorder for another few minutes. You will find that the magnet is really noisy next to the tape recorder. The closer you get, the louder the noise. When you get close, the sound in the tape recorder becomes strange. That's funny! When you remove the magnet, the sound of the recorder returns to normal.
I found the secret!
2.
Omission consistency of relativity
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In life, there are many physical quantities related to time, such as pendulum period and specific heat capacity. Why do you need time? Obviously, time is not an illusion.
People think that inertia is the property of matter itself, but it is not. Inertia exists in four-dimensional space (that is, time and space), and time and space have qualitative properties (the position is not easy to change), which makes objects have inertia. The simplest proof is the mechanical clock, which uses the inertia of matter to work. Without inertia, the clock will reach the speed of light. There are many examples, such as LC oscillator circuit, where it takes time for an object to fall.
The performance of inertia is not in the three-dimensional space, but in the relative relationship with the time dimension. The acceleration of an object does work on a certain substance in the space-time dimension, and the deceleration means that this substance does work on a moving object. About this substance, we need to prove it and understand its microscopic significance.
The work done by inertia in time and space should satisfy w=mav, so in the time dimension, changing the time distance requires work, that is, doing accelerated motion, and if it is not changed, it will not do work, that is, doing uniform or static motion.
If there is no friction, great speed can only be achieved by force. Are the two directly related? We can compare inertia and friction. Friction can convert the kinetic energy of an object into internal energy, while inertia can transfer the kinetic energy of an object to the time dimension and move again without loss. This is the difference between inertia and friction.
It is necessary for a mass object to reach the speed of light, because inertia restricts the movement of the object, but it is not impossible to surpass the speed of light. Instantaneous high temperature is used for milk sterilization, which can be used at instantaneous high speed without violating the law of conservation of energy.
But this can't travel through time and space. Light is only a manifestation of matter, and it is also produced from matter. Just like the sun we see now is the sun five minutes ago, because only information meets people at the speed of light. Even if it can cross, it will not change history, because it is only information transmitted at the speed of light.
It is very dangerous for people to travel through time and space. Any action will change history, but our time and space have never changed, which shows that human beings have never traveled through time and space in a limited time. Maybe the time and space they travel through is not our dimension, but a copy of our dimension. If we can travel through time and space, how did we come from and what will happen in the future? We only know for a short time, just like a small part of the movie. Even if there is any power to speed up the movement of time, people will not feel that many things in time and space have been determined. There is a substance that people don't know that gives people consciousness. We all feel this way. Everything outside our consciousness is certain, and our consciousness can change these certain things. Our consciousness is seen by others. It has also been confirmed. This is a very profound logical relationship. It is imperceptible that human consciousness uses this relationship to determine the movement of "relativity" time between people.
When a person ascends in an elevator with an acceleration of 9.8m/s2 in space and on the earth, the effect is the same. Inertia is relative to time, and force is a continuous quantity. Inertia is static force and motion is acceleration in time dimension.
If time is related to the speed of light, inertia is a manifestation of time. The faster an object moves in the time dimension, the lower the ratio to the speed of light, and the greater the energy. Inertia comes from the time dimension. Will there be anti-inertia when it exceeds the speed of light? The magnitude of inertia should be proportional to v/c, and this formula can be deduced by adding other quantities.
3.
The little secret in the highway guardrail
Our family went out to play the other day. On the way through a long highway, the car sped, feeling very flat and the scenery was beautiful. When I got home, because it was dark, the scenery on both sides of the expressway disappeared, but to my surprise, I found a little secret hidden in the guardrail.
Whenever night falls, the car lights turn on and shine forward. The guardrails on both sides of the front of the car are like countless street lamps. They are evenly arranged, just like a string of dazzling pearls, which makes the whole road shine. I asked my father curiously why. He just explained it roughly: this is due to the reflection of light, which can improve safety.
In order to find out, I went home and looked up a lot of information. It turned out that a large number of reflective plates, reflective lights and reflective signs were installed on the expressway. They can reflect light, because there are glass beads on the reflective coating, which can refract and scatter light. There are signs made of reflective materials at intervals on the expressway, including 50m 1 for normal straight sections, 20m 1 for bends and 5m/ramp, which have obvious warning function. The surface of this sign is coated with a fluorescent paint with high reflectivity, which can reflect the light incident at all angles into relatively concentrated parallel light. Without light, it will be very dark. Once there is light on the surface of the sign, it will be reflected back to its original direction. In addition, as long as the automobile taillights shine on these reflectors, they can produce the same luster as fog lamps, which is very conspicuous.
If the reflector on the expressway is dense, new and big, it will give people a feeling of being suddenly enlightened. Under the action of the reflector, the width, turn and slope of the expressway ahead can be seen at a glance, and drivers can easily drive with a good vision, reducing the occurrence of many accidents at night.
There is still a lot of scientific knowledge on the expressway. I will continue to work hard to explore more secrets and solve more problems in the future!