The 10 largest scientific laws and theories that we should know most
thanks to mythological unnamed delivery
news source: Science and technology daily
the famous popular science web site HowStuffWorks ("how things work"), which lists 10 major subjects that people should know most about the first time. The law of learning.
10. theories: the big bang theory
standard interpretation: the Big Bang is a cosmological model describing the initial conditions of the birth of the universe and its subsequent evolution, which has the most extensive and accurate support of today's scientific research and observation. The general view of the Big Bang is that the universe evolved from a very high density and very high temperature before the past limited time (according to the best observations in 2010, these initial states existed about 13 billion 300 million to 13 billion 900 million years ago) and were expanding to the present day. The state of the state.
9. extrapolated the age of the universe: Harbert's law
standard interpretation: the red shift from the distant galaxies is directly proportional to their distance. After nearly ten years of observation by Harbert and Milton Humerson, the law was first formulated in 1929, Vf=Hc * D (away from the rate = Harbert constant by the distance relative to the earth), which is often cited as an important evidence to support the big bang and become the basis of the universe expansion theory.
8. changes the whole Astronomy: the Kepler three law
standard interpretation: the law of planetary motion, the three simple laws of the planetary movement observed by Kepler. The first law: each planet is running around the sun in its own elliptical orbit, and the sun is in a focus of the ellipse; the second law: in the same time, the area of the line between the sun and the moving planet is equal; the third law: the square of each row of stars around the solar cycle and them The cubic of the half long axis of the elliptical orbit is proportional to the cubic.
the cornerstone of most theories: the law of universal gravitation
standard interpretation: Newton's law of universal gravitation is expressed as the attraction of any two particles in the direction of the continuous line. The size of the gravitational force is proportional to the mass of their mass, inversely proportional to the square of their distance, and has nothing to do with the chemical or physical state of the two objects and the intermediates. The theory can be expressed by a formula that has been written into the physics textbook in high school today: F=G * [(m1m2) /r2]
6. physical sciences have basic theorems: Newton's law of motion
standard interpretation: Newton's first law is the law of inertia; and the second law of Newton establishes between the mass and acceleration of objects. The third law of Newton is the law of acting force and reaction force.
5. thermodynamic basis is basically complete: the three law of thermodynamics
standard interpretation: the first law of thermodynamics, the heat can be converted to work, and the work can be transformed into heat, that is, the conservation of energy and the law of conversion; the second law has several expressions, one of which is that heat can not be taken from a cryogenic object. It is transmitted to high temperature objects without causing any other changes; the third law, when thermodynamic temperature is zero (i.e., T=0 opening), the entropy of all perfect crystals is zero.
4. great wisdom in 200 B.C.: Archimedes's law
standard interpretation: the Archimedes law in physics, that is, the principle of Archimedes buoyancy, refers to the gravity of a fluid immersed in a fluid that is affected by the force of fluid equal to the fluid that is displaced by an object. This resultant force is called a buoyancy. . Mathematical expressions are: F floating =G row
3. our own discussion: evolution and natural selection
standard interpretation: evolution, evolution, in biology refers to the changes in genetic traits in the population from generation to generation. Natural selection, also known as natural selection, refers to the genetic characteristics of organisms in survival competition, with a certain advantage or disadvantage, and then the difference in survival ability, and the difference in reproductive capacity, so that these characteristics are preserved or eliminated.
2. has changed the way of understanding the universe forever: general relativity
standard interpretation: gravity is described as a geometric attribute (curvature) in time and space, which is directly linked to the energy momentum tensor of matter in time and space and the energy and momentum tensor of radiation. Stan's gravitational field equation (a system of two order nonlinear partial differential equations).
1. God throw Dice: Heisenberg uncertainty principle
standard interpretation: German physicist Heisenberg proposed in 1927 that the uncertainty in quantum mechanics indicates that in a quantum mechanical system, the position of a particle and its momentum (the mass of a particle) are not available. At the same time, it is determined.