物理复习2（Physics review 2）.docVIP

物理复习2（Physics review 2） Mechanical energy, molecular dynamics, theoretical internal energy 1. an object can do work, we say that it is with energy. Due to the movement of the object can be called kinetic energy. The speed and quality of energy with the object of moving objects with greater speed, higher quality, greater kinetic energy. All moving object has kinetic energy. 2. potential energy into gravitational potential energy and elastic potential energy. The object is to give high called gravitational potential. The greater the mass of a body, lifted higher, gravitational potential is greater. The elastic deformation of the object is called energy, elastic potential energy. The elastic deformation of the object, it has more elastic energy. 3. kinetic energy and potential energy are collectively referred to as mechanical energy. Energy, power and heat units are joules. The kinetic and potential energy can be transformed into each other. The basic theory of molecular motion: a substance composed of molecules and molecules is extremely small. The irregular motion of molecules never cease. There is interaction between the molecular attraction and repulsion between. 4., when the different substances contact each other, they enter each others phenomena, which is called diffusion. The phenomenon of diffusion shows that molecules do endless, irregular movements All 5. objects in total molecular kinetic and molecular potential of irregular motion, can be called objects. All the objects are within. Objects can with temperature. The higher the temperature, irregular moving molecules more fierce, objects can more. The higher the temperature is, the faster the spread. A large number of irregular motion objects within 6. molecules called thermal motion, also called heat energy. The two methods can change the object is: work and heat transfer. Can work on the object object object can be increased, the work object is reduced; the heat absorption of the material, the object can i