物理估算,一般是指依据一定的物理概念和规律,运用物理方法和近似计算方法,对所求物理量的数量级或物理量的取值范围,进行大致的推算。中学物理中常用的估算法主要有:常数估算法、理想模型估算法、合理近似估算法、设计实验估算法等。解估算题的要领:1.建立合理的物理模型;2.挖掘隐含条件;3.寻找估算依据,理出解题思路;4.分清主次,合理近似。一、利用物理常数进行估算估算题中往往告诉的已知量很少,或有时什么量也不告诉,解题时就要求我们灵活地运用一些物理常数,有时甚至需要我们根据经验来适当地拟定一些物 Physical estimation generally refers to the use of physical methods and approximate calculation methods in accordance with certain physical concepts and laws to roughly estimate the magnitude range or physical quantity range of the physical quantity sought. The commonly used estimation methods in middle school physics are: constant estimation method, ideal model estimation method, reasonable approximation estimation method, design experiment estimation method, and so on. Solve the following questions: 1. Establish a reasonable physical model; 2. Dig out hidden conditions; 3. Find the basis for estimation, and solve the problem-solving ideas; 4. Distinguish between primary and secondary, reasonable approximation. First, the use of physical constants to estimate Estimating often tell the known amount is very small, or sometimes do not tell what amount, solve the problem requires us to use some of the physical constants flexibility, and sometimes even we need to properly formulate based on experience Some things