electromagnetism basics

(magnetic strength).There is also a small problem, that is, the magnetic electricity, or electromagnetic transmission process is the speed of light, or instantaneous, my view is instantaneous, but the argument is too much, the dozen 50. 5. Prove Abe's lawThe Lorentz force is the superposition of large quantities of charged particles. If the electron density in the volume of the current element IDL is ρ, the cross-sectional area is s and the number of electrons is n; then we have:Idl = q dl/dt=

Python programming basics-hardware basics of computer principles and python programming Basics I. registers: registers are some small storage areas used inside the CPU to store data, and are used to temporarily store data and calculation results involved in calculation. 1. register features: 1) registers are located inside the CPU. The number is very small. There

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Day 1 Computer basics, day Computer BasicsComputer Basics 1. Why learning computer basics? The role of programming languages: commands that humans use to make machines understand and act. It is similar to English in human society. Relationship: Computer Hardware-Operating System (OS)-software (finished programming language, learning results ). Hardware: There is

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JavaScript language basics 1: javascript language basics We need to know what JavaScript is. First, we need to know what features JavaScript has? What is JavaScript? It is an object-based and secure scripting language! It is a scripting language. Therefore, it has the following features: 1) It is a scripting language and an explanatory language. It is interpreted line by line during the program running. 2

JavaScript language basics 3: javascript language basics JavaScript can process data types from the real world, such as numbers and text. At the same time, JavaScript also contains some Abstract data types, such as object data types. JavaScript is a weak type language. In many cases, when we process data, we do not need to declare the data type. Their types have been calculated. Since JavaScript is a weak t

Python BASICS (12)-module, python basics-Module URL: http://www.cnblogs.com/archimedes/p/python-modules.html.Module Introduction If you exit the Python interpreter and re-enter, all previously created definitions (variables and functions) will be lost. Therefore, if you want to write a program that has been saved for a long time, you 'd better use a text editor to write the program and input the saved file

Programming basics 2. java programming Basics [URGENT] C ++ programming basics 2 1.The first is 5000, 714x5 is, and the entire division isThe second is 0, because the operation is 5/7, the result is 0, and then 0*1000 is 0.2.(A B C) |! (A | B | C)Answers to the second edition of object-oriented programming Basics

One of the Microsoft. Net Remoting Tutorials:. Net Remoting basics and remoting Basics I. Remoting Basics What is Remoting? In short, we can regard it as a distributed processing method. From the perspective of Microsoft products, it can be said that Remoting is an upgrade of DCOM, which improves many functions and is well integrated into the. Net platform. Micro

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Python Learning 1: sequence basics and python sequence Basics By NiceCui This document is not reposted. If you need to reposted, you must obtain the author's consent. Thank you. Link: http://www.cnblogs.com/NiceCui/p/7858473.html Email: moyi@moyibolg.com Date: Python Learning 1: sequence Basics I. Sequence Introduction In Python, some types of variables sto

Java basics 10-interfaces, Java basics-interfacesJava basics 10-interface 1, interface definition and instance 1/* 2 abstract class AbsDemo 3 {4 abstract void show1 (); 5 abstract void show2 (); 6} 7 8 when the methods in an abstract class are abstract, in this case, the abstract class can be defined and expressed in another form of 9, that is, the interface. 10

-------Android Training, Java training, look forward to communicating with you! ----------The reflection mechanism of Java is one of the characteristics of Java, the reflection mechanism is the foundation of the framework technology, using reflection can make the program more flexible, avoid writing the program to die in the code. For many beginners who have only touched the basics of Java, reflection is a very obscure concept, let's say some of the a