EducatorSharmin

   Physics Force Force is that quantity the application of which a stationary object start move and a body moving, with a uniform velocity change its velocity. All objects in the universe attracts one another by a force due to their mass. This force is called the gravitational force. An object that has mass attracts another object by the gravitational force. Fundamental forces are actually only in number. These are: 1. Gravitational Force: All objects in the universe attract one another by a force due to their mass. This force is called the gravitational force. Ex. The stars are revolving within the galaxy. 2. Electromagnetic Force:  The eletromagnetic force is a type of physical interaction that occurs between electrically changed particles. 3. Weak Nuclear Force: It is called weak because it is weaker than the electromagnetic force but not at all weak like the gravitational force. 4. Strong Nuclear Force: This is the strongest force of the universe; this is hundred time...

     Algebric Expression:  An algebraic expression is a mathematical phrase that can include numbers, variables (letters that represent unknown values), and operation symbols (such as +, -, ×, ÷). Unlike an equation, an algebraic expression does not have an equal sign.   The word algebra comes from an Arabic word (al-jabr, literally means restoration). Its roots can be traced to a mathematician, Muhammed bin Musa al-Khwarizmi  (780 - 850).  He wrote the Compendious Book on Calculation by Compendious Book on Calculation by Completion and Balancing, which established algebra as a mathematical discipline that is independent of geometry and arithmetic.               Q. What is algebraic expressions? Ans: Meaningful organization of operational signs and numerical letter symbols is called Algebraic Expressions.   Such as,  2a  +  3b  - 4c   is an algebraic expressions. In algebraic expre...