energy quality equation
We assume that there is a flat car on an ideal smooth plane. We know that if we push the car at this time (apply an external force), the car will slide, and if In the absence of external force, the car will always slide forward at a constant speed (acceleration is 0). If we want to make the car faster, we must continuously apply external force to the car (making The acceleration is greater than 0). When the speed of the car reaches the speed of light, it will no longer accelerate (in the physical category known to man, the speed of light is the highest speed that matter can reach), and you can apply more and greater external forces to it. So where does the external force (energy) we exert at this time? In fact, the energy does not disappear, but is transformed into mass, which means that the mass of the car will continue to increase.
Atomic bomb
Einstein When explaining this connection, he put forward the famous mass-energy equation: E=mC^2. Energy is equal to mass times the square of the speed of light. Even in the view of theoretical physicist , who is not very concerned about the practical value, this is a thrilling conclusion; energy is equal to 9 million times the mass. If the mass of a fingernail-sized substance disappears completely, the energy released is Calculated based on 10,000 tons of standard coal. In 1939, Yorio Curie , Fermi , and Szilard independently discovered the chain reaction (nuclear fission), enabling mankind to find a way to release huge atomic energy. The discovery of the chain reaction made the atomic bomb the largest lethal weapon that mankind can make (hydrogen bombs have greater lethality). Only a few years later, the first atomic bomb of mankind was successfully tested in the United States, and then Japan was subjected to the cruelest punishment in the history of human warfare. Some of them were instantly reduced to elementary particles, the real Soul flies away. The discovery of this theory poses a fatal threat to mankind,This made Einstein, who loves peace deeply, regretted opening this Pandora's Box until he died.
Cuban Missile Crisis
However, Einstein may not have thought that due to the huge destructive power of the atomic bomb, the atomic bomb has become a strategic weapon, which has no practical significance in the war. Possessing a large number of nuclear weapons (the atomic bombs of any country in the Five Normals are sufficient to destroy the earth), forming a "terrorist balance" with each other, that is, no one can use nuclear weapons in a conflict, which actually means that the major powers in the world There is no possibility of a large-scale war (the Cuban Missile Crisis in 1962 was the closest human beings to a full-scale nuclear war, a US-Russian confrontation, which ended with Kennedy’s hard-line Khrushchev’s admission), and the atomic bomb actually brought great powers With "passive eternal peace", Einstein can just look down if he knows it like a fountain.
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