As the most basic natural subject, physics runs through the development of human civilization. Since ancient times, it is indispensable for physics to participate in the construction of information society. The basic principle of wood drill fire is the principle of friction heat generation. When heat is accumulated to a certain extent, wood can react violently with oxygen to produce flame. Physics is widely used in today's life, such as getting up in the morning, brushing teeth and washing. Using the unevenness of the toothbrush surface to increase friction can make the toothbrush cleaner and more thorough. After washing, have a big western breakfast. It is easier to cut bread with a sharp knife. The utilization principle is that the smaller the contact surface, the greater the pressure, so it is easier to cut the object. After a full meal, I drove my beloved sports car to the company. When starting, I use electric spark to ignite the gas in the cylinder, so that the piston drives the bearing to rotate, thus making the car move forward.
Arrive at the company, sit in front of the computer and start a day's work. The computer originally invented was very big, and now a computer desk is enough to hold all the parts of the computer. It is precisely because of quantum mechanics that the invention of semiconductor silicon chip makes the circuit integrated, and a large number of circuits are carried on a small chip, which greatly reduces its occupied space.
Eating instant noodles in the office at noon, chopsticks are naturally essential. Simply put two pieces of wood and move your wrist to send food into your mouth. The lever principle is used here. A larger force acts on the smaller arm, and a lighter object on the larger arm can be lifted.
It is also enjoyable to call a friend after work and have a hot pot together. Nowadays, induction cookers are very popular. The basic principle of induction cooker is electromagnetic induction, which uses the heat generated by eddy current to provide heat for hot pot.
It was dark when I came out of the hot pot, and the neon lights in the night market were colorful. This is the study of atomic energy level through quantum mechanics. Electrons with different energy levels emit different photon frequencies, so they look gorgeous and dreamy.
Turn on the TV at home and relax. The color TV at home is gorgeous, using the magnetic deflection principle of electron beam, and then constantly changing scanning to form a series of action pictures.
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This shows the application of physics in life. Not only in daily life, but also in other fields.
For example, in the field of national defense, in order to improve the precision of attack, relativity is introduced to calculate, so that the error of missiles in Fiona Fang is no more than 5 meters; The ultimate weapon of mankind, the atomic bomb and the hydrogen bomb, is to use Einstein's mass-energy equation to convert matter into energy and make a small atomic bomb explode with amazing destructive power.
Physics plays a decisive role in the development of modern biology. The application of X-ray diffraction technology opens the door to DNA structure. The discovery of wave-particle duality made the microscope break through the bottleneck and invented the electron microscope, which unveiled the mystery of cell submicroscopic structure for people. The use of radioisotope labeling technology shows us the specific location and production process of various organic substances. These help us to understand the essence of life more deeply.
The establishment of the network is to connect the whole world into a whole, and the global village is no longer an empty talk. First of all, Bell invented the telephone, which used electric current to spread sound signals and formed a preliminary wired network. Then it was perfected to form the Internet. Later, the invention of wireless technology based on electromagnetic waves established a global wireless network, which truly realized point contact anytime and anywhere.
It can be seen that physics has now penetrated into almost all fields and played a mainstay role in human development. In a word, human society is inseparable from physics.
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I don't know. Are you satisfied with my answer? Time is pressing, and I also feel that I am willing but unable ... All applications of physics only write the most basic theoretical basis, focusing on application! Even if you can't use all of them, it's not a big problem to use 1 12, hehe. There are many examples, I don't want to list them one by one, I believe you can cite many:)
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