Sir M Academy

Input Output Devices Input Devices The devices which are used to give data and instructions to the computer are called Input Devices. Various types of input devices can be used with the computer depending upon the type of data you want to enter in the computer, e.g., keyboard, mouse, joystick, light pen, etc. Keyboard. It is the most commonly used input device. It is used to enter data and instructions directly into the computer. There are 104 buttons on the keyboard which are called keys. Did you Know? The keyboard was invented 134 years ago by Christopher L. Sholes . Mouse is another input device which is commonly found connected with the computers. It is basically a pointing device which works on the principle of Point and Click. When the mouse is moved on the mouse pad, a light beam underneath reflect to give motion to the pointer on the screen. Joystick and Game-pad . Computer Joystick and Gamepad Joystick and game-pad are also input devices which are also input devices which are...

What is Statistics? Statistics is the science concerned with developing and studying methods for collecting, analyzing, interpreting and presenting empirical data . Statistics is a highly interdisciplinary field; research in statistics finds applicability in virtually all scientific fields and research questions in the various scientific fields motivate the development of new statistical methods and theory. In developing methods and studying the theory that underlies the methods statisticians draw on a variety of mathematical and computational tools. Types of Graphs  In statistics, we generally come across with vast sets of data. Just to recall that statistics is a science of numbers that is concerned with collection, organization, measurement, and analysis of the numerical data. It usually deals with the quantity more than quality. Sometimes, it becomes really hectic to work with a large amount of data. There are tedious and lengthy calculations in statistics. It is easier to draw...

Geometric shapes of different sizes can be seen everywhere; in nature as well as in man-made structures. Men work with these geometric shapes in a variety of fields. There is geometry in art, sculpture, engineering, architecture, and many other fields. Recognition and knowledge of geometric properties help develop logical thinking and problem solving skills. Clearly, you need to study geometry to better understand and appreciate the things around you. Listed below are terms and definition in geometry. Geometry - branch of mathematics that deals with points, lines, planes and solids and examines their properties.  Point – has no size; length, width, or height. It is represented by a dot and named by a capital letter. Line – set of points which has infinite length but no width or height. A line is named by a lower case letter or by any two points on the line. Plane – set of points that has infinite length and width but no height. We name a plane with a capital letter. Space – set of ...

One of the important characteristics of living things is that they are made up of cells.  Cells  are called the basic unit of life. They can give information about life processes of an organisms. Since the very first discovery of cell, different studies have led to the information of the cell theory . The cell theory was developed as a result of the works of different biologists through a long period of time.

By now, you are already familiar with  algebraic expressions . The expression  x  and  x+3  are algebraic expressions. In expressions,  w  is a  variable . Variables may be used to represent patterns in expressions. Suppose that in a certain rectangle, the length is 3 inches more than the width. There are possible values for the length and width as shown in the table below.    Width     Length     3    3+3 or 6     5    5+3 or 8     7    7+3 or 10     w     w+3 Can you see the pattern? From the table above, the pattern that exists between the width and the length is summarized by the algebraic expressions w and w+3, respectively. That is the length, the length of the rectangle is 3 inches more than its width. Mathematical symbols and its meaning Many words and phrases suggest mathematical operations . The follow...

Keyboard is the most common input device. It is one of the most important parts of a computer which is used to enter commands, text, numerical data and other types of data by pressing the keys on the keyboard. A user talks with a computer through input devices such as keyboard. Input devices are used to enter data to a computer. Keyboards are an indispensable accessory for a computer. One of the most basic input devices, computer keyboards are used in navigation, execution of processes, programming and several other purposes. Several software based application directly derive their existence from a keyboard. For instance, social networking websites, programming languages, navigation over the computer menus etc. utilize a computer keyboard. Even this very article wouldn’t have been possible without a keyboard. A normal computer keyboard is composed of around 110 keys. Although on the basis of key arrangements there are four major keyboard layouts being used worldwide, QWERTY, AZERTY, QW...

E very day I use Laptop. Just like you, I wanted to make my laptop stay longer to use and work in a longer period of time. In my hours of usage, my battery can’t stay longer because of some annoying applications which are not being use. The laptop batteries can stay for 4-6 hours of usage which depends in brand. I often forget or ignore it to keep cool because of work load and deadlines to submit some paper works.  One day, I realize that batteries provides juice power to laptop and continuity of your work. But, how to keep your batteries sustain in a period of time and operational for a span of 3-5 years are questions that keep on popping regularly to my mind. Listed below are my tips and tricks to keep it operational and stay in a period of time. 1. Do Not Overcharged your battery most of the time. Overcharging your battery well not guarantee or give you extra percent after it reach 100% and it might explode. 2. Do Not Discharged your battery repeatedly. The battery has a finit...