Computer

Computer

Computer-

                                  

Computer

-Defination of computer:-

                                             Computer is a electronic device that accept dat from user ,processing data by performing calculation and operations on it and generate output as a result for the users.

In simple lauguage we can say that computer is

 

a electronic  machine that is able to take

 

information (as a input) , do some work on it

 

(processing) and make new information

 

(output).

 

A computer is understood to be a device that

 

computes or calculate or compute numbers.

                                                

Compters

Function of computer and some definitions:-

Input:- Informations or data that is enter in computer.

              Means that data which provide to computer to performing operation on it. The most common input devices are keyboard, mouse,magnetic tap readers etc.

Output:- The data which provide computer for user after performing different operation.

It make processed data available to user.

Storage:- It store data and programes.

Computer.

Processing:- It is the sequence of actions taken on data to convert it into information which is meaningful to user.It can be calculations or decesions taken by computer.

Data:-Unprocessed row facts and figure like numbers,text,audio,video etc.

Information:- When data is processed,organized structure and presented in given context so as to useful.

Instructions:- It is the command given to computer in computer lauguage by the user .

Program:- Set of instructions given to the computer in order to perform some tasks.

Hardware:- It is the collections of the physical elements that constituent a computer system.

Simply say - all the physical component of the computer including keyboard, mouse, monitor etc. are the part of hardware.

                                                   

Computer Hardware(keyboard)

                                       

Computer Hardware(Mouse)

Software:- It is the set of programe and processures.

Simply say – software  tells hardware  what to do and how to do.The program and lauguage used by the computer are called software.    

                                  

Computers

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A great leader.| how become a great leader.

How become a great leader

A great leader or a good leader

Essay on a good leader

Some people are known to be born leaders . the quality runs in their family . Some others peoples are inspired by such people and work upon embedding this quality. Some fail at achieving it and som are successful in attaining through continual efforts. While leadership is is a powerful quality. For become a great leader we have to learnt how a leader lead the peoples .

                          

a great leader

Qualities of a great leader or how we qualify for a great leader :-

Here some five main qualities of a great leader .

By  applying these qualities in  life we can become a great leader .

·       Honesty:- It is the one of the main quality of a leader or become a great leader. A great leader leads by examples. So if you want your team or peoples or group to look up to you , have faith in your ideologies and in the tasks which you assign them, it is imperative to you to be honest yourself. A deceitful person may attract peoples by way of manipulation, however he will soon lose his credibility. So  for qualifying the great leader to become honest yourself and attract peoples. Honesty is best way to attract peoples.So become Honest.

·       Communication:- A leader does not think of himself as superior to you and thus doesn’t believe in maintaining a distance. He rather ensures a flow of two way communication to share ideas , discuss issues and maintain a cordial relation. So for qualifying the great leader don’t believ in two way communication . Communicate friendly with peoples.

·       Self confidence :- The level of self confidence  leader possess is impeccable.They are sure about  themselves and know exactly how to put their ideas  or points across to inspire audience. Great leader also grow the level of confidence in their team or peoples.So for qualifying the great leader we have to increase the level of  self confidence upto a limit.

·       Transparency:- Great leader do not hide facts or play games . They maintain their transparency while dealing in both personal and professional life or relationship.This is main fact or point due to this they are highly trusted and respected.

·       Patience :- A people who is impatient losses temper frequently and can never qualify to be a great leader .Possessing patience is one of the main key to becoming a great leader. Only if a person is patient can be understand the problems of others and helps peoples to solve their problems.

Some of the other quality of a great leader is Decesion making skill, Listen attentively, Talk less act more, Don’t play favouritisim, Be a problem solver , Provide feedback, Quick decision maker etc.

SubhasChander Bose was a great leader and indian nationalist who fought courageously during world war 2 for the freedom of india from british rule . They are the best example of a great leader.

Conclusion:-   A great leader has ability to inspire ohers and instill leadership qualities in his subordinates to generate future leaders.    

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Number system in math

Numbers in mathematics

Number system

Number system in math

                               

Numbers in math

·       Natural number:- The numbers which start from 1 and goes upto to ∞ are called natural numbers.It represented by N.

                    N = 1, 2, 3, 4, 5, …………………∞

·       Whole numbers:- The numbers which start from zero(0) and goes up to ∞. It is represented by W(capital W).

              

 W= 0, 1, 2, 3, 4, ……………∞

·       Integers:- All the number between -∞ and ∞.It is represented by Z.

                   Z= -∞……….. -2, -1, 0, 1, 2,……………..∞.

Two type of integers are

A.    Positive Integers:- 1, 2, 3, 4,……………∞.

B.    Negative Integers:- -1, -2, -3,…………… -∞.

·       Even Numbers:- The numbers which are divisible by 2 or multiple of 2. i.e. 2, 4, 6, 8,……………….∞.

·       Odd Numbers:- The numbers which are not divisible by 2 or not multiple of 2. i. e. 1, 3, 5,…………………∞.

·       Prime Numbers :- Natural numbers which are divisible by itself             and unity . i. e. 2, 3, 5, 7, 11,………..

                The 15 prime numbers between 1 to 50.

               The 10 prime numbers between 51 to 100.

                The 25 prime numbers between 1 to 100.

       Only 2 is least prime number and also  only 2 is even prime      number.

·       Composite Numbers:-  The numbers which other divisors besides 1 and itself i.e. 4, 6, 8, 9 etc.

·       1 is neither  prime nor composite.

·       Rational  numbers:- The numbers which written in form p/q where q≠0, and p,q are the integers. i.e. ¾,  4/5, 1/3, etc.

       

         Every rational number can expressed in decimal form. There are         infinitely many rational numbers between two rational numbers.

·       Irrational Numbers:- The numbers which cannot written in form of p/q . i.e. √2, √5,  etc.

                                          

Number system in math
Irrational numbers

   π is an irrational number yet its values appears in rational numbers (π = 3.14). Because these are it approximate values.

·       difference of the rational number and irrational number is always irrational number.

       Sum and difference of rational number and irrational number is always irrational number.

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reasoning questions in hindi

       Reasoning Question in hindi laugauge

   1.     मोहन, गणेश से लम्बा है राम , मोहन से लम्बा है राकेश , गणेश से छोटा है तो बताओ कि सबसे लम्बा कोन है:

क.   मोहन   ख.  राम    ग.   राकेश    घ.  गणेश.

   2.     एक पंक्ति में 10 व्यक्ति बैठे हैं राम का स्थान बाएँ से 4^th है ,तो दाये से राम का स्थान क्या होगा?

क.  2    ख. 4   ग. 6   घ. 7.

 Reasoning Question

   3.    रमेश उत्तर की ओर 4 मीटर चलता है फिर दाईं ओर 3 मीटर चलता है, बताए कि वह अपने प्रारम्बिक स्थान से कितनी दूरी पर है?

क.  5 मीटर    ख. 6 मीटर     ग. 4 मीटर      घ. 8 मीटर.

   4.    एक व्यक्ति का परिचय देते हुए एक महिला ने कहा ‘ मेरे पिता इसके पिता के पिता है , तो बताओ महिला उस व्यक्ति का कोन है?

क.  भतीजा   ख. बुआ  ग. बहन  घ. भाई.

    5.    राम ने रवि का परिचय देते हुए कहा यह मेरे भाई के बहन कि माता के पति के पिता का पोता है , तो बताये रवि राम का कोन है?

क.  चाचा     ख. भाई    ग. चचेरा भाई   घ. बेटा.

 reasoning questions in hindi

                          

                                       reasoning questions in hindi

    6.    पांच मित्र संजीत, राजेश, राम, राजीव और सुधीर एक पंक्ति में बैठे है, राजीव ,राजेश के बायीं ओर दूसरा बेठा है ,सुधीर तथा राजीव के बीच में एक व्यक्ति बेठा है , राम का परोसी राजेश है तो बताओ बाये से तीसरे स्थान पर कोन है ?

क.  संजीत   ख. राम   ग. राजीव   घ. राजेश .

    7.    P, Q से लम्बा है परन्तु N से छोटा है S ,K से छोटा है परन्तु N से लम्बा है तो बताओ कि सबसे छोटा कोन है ?

क.  K    ख. S    ग.  P  घ. Q .

    8.    यदि किसी कोड में ‘DATE’ को ‘#%$@’ तथा ‘STYLE’ को      ‘*$©↑@’  लिखा जाता है तो ‘DELAY’ केसे लिखा जायेगा ?

क.  #@↑©%   ख. #©$%@   ग. #$↑%©  घ. #@↑%©.

   Reasoning Question

       9.    AC, EG, IK, .........

क.  ON   ख. LM   ग. MO  घ. OP .

       10.                       1001,  1004, 1010, ………, 1046.

क.  1022         ख.  1024       ग.  1030       घ.  1028 .

Answers:-

        1.    ख.

        2.    घ.

         3.    क.

         4.    ख.

          5.    ख.

           6.    ग.

           7.    घ.

           8.    घ.

          9.    ग.

         10.   क.

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Chemical reaction and its type

Chemical reaction and its type 

    What is Chemical Reactions?

Ø     Chemical Reaction:-The process in which involve a chemical change  is called a chemical reaction.Rearrangement of atoms takes place in a chemical reaction.

          During chemical reaction energy either released or absorbed.

·       Reactants:- The substance which take part in a chemical reaction.

·       Product:- The new substances formed as a result of chemical        reaction.

                     

chemical reaction

Ø Type of chemical Reaction:-

·       Combination reaction :- The reaction in which two or more substances combine to form a new single substance.

Example:- C + O₂ → CO_2.

·       Decomposition reaction:- The reaction in which a single compound decompose into two or more smaller compound.

Example:-

         CaCO₃       →       CaO +CO₂

    In above example upward arrow represent heat is evolved in this reaction.

The Decomposition reaction is the inverse of Combination reaction.

·       Displacement reaction:- The reaction in which the atom of one element displace the atom of another element from compound and form a new compound.

Generally a more active element displace the another element which is less active .

Example:-

                 Fe + CuSO₄   →        FeSO₄ +Cu

In this example Fe is more active than Cu .

·       Double Displacement Reaction:- The reaction in which two compounds react and an exchange of ions take place and form  new compounds.

Example :-

             BaCl₂ + Na₂SO₄   →         BaSO₄  + 2NaCl

Ø Precipitation reaction:- Any reaction in which precipitate (insoluble solid ) is formed is called precipitation reaction.

Double displacement reaction are also precipitation reactions.

Ø Exothermic reaction :-

                                       The  chemical reaction in which heat is released or evolved.

Example :- 2Mg + O₂  →      2MgO + Heat released


        

Type of chemical reaction

Ø Endothermic reaction :-

                                         The  chemical reaction in which heat is absorbed.

Example:-   N₂ + O₂   →      2NO – Heat Absorbed.


       

Type of chemical reaction

Ø Reversible Reaction:-

                                The chemical reaction which proceeds in both direction (Forward as well as Backward direction) is called Reversible reaction.

Example :   CaCO₃  ⇋     CaO  + CO₂

Ø Irreversible reaction :-

The chemical reaction in which reaction proceeds in only one direction is called irreversible reaction.

               Example:     Zn + H₂SO₄      →     ZnSO₄ + H₂

    

Ø Neutralisation reaction :-

The reaction in which acid and base react and form salt and water .

                   Example:   KOH + HCl     →       KCl + H₂O

Ø Photo Chemical Reaction:-

                          The chemical reaction which occurs in the presence of sunlight is called Photo Chemical Reaction.

Example:   6CO₂ + 12H₂O      →       C₆H₁₂O₆  + 6H₂O +6O_2.

             This reaction is also called Photosynthesis.

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