Science and Technology

Fundamentals of Computer Table of contents: 1. Introduction  2. Input / Output & Processing of the Computer 3. Memory device 4. Types of computer 5. Characteristics of Computer 6. History and generation of computer  7. Applications of computer  1. Introduction : The term 'Computer' is derived from the Latin word  'Computare' which means to calculate. C = Commonly O = Oriented M = Machine P = Properly U = Used for T = Training E = Education R = Research Computer is an electronic machine, that process the input data according to the given instruction & gives output as a result. It also saves the result for future use. Computer work as following cycle: Input ➡️ process➡️output 2. Input / Output & Processing of the Computer: INPUT DEVICES • Keyboard • Mouse • Scanner • Digital Camera • Joystick • Pen drive OUTPUT DEVICES • Monitor • Printer • Plotter • Speaker Processing of the computer: (CPU) The most essential part of the co...

MS-Excel  Introduction Ms-Excel is one of the DBMS Software. It manipulates and manages the database in very well manner. It provides the sophisticated tool for calculating, projecting and analyzing numeric data & presenting the result in professional quality documents & chart. Excel, for that matter any spreadsheet essentially comprises of row & column. Inter section of row & column is called cell. Work Book: - A work book is the main document of excel. By default a work-book has three work-sheet, we can add more work-sheets. Work sheet:-A work-sheet is the working document of excel. It has an electronic sheet where calculation & operation are performed. The worksheet has 256 column & 65536 rows. How to open Ms-Excel ? • Go to start menu • Click on program • Click on Microsoft Excel Home menu To setting print area • Select required cell range • Go to file menu • Click on print area • Click on set print area • Click on clear print area to rem...

MS-Powerpoint Introduction: Ms-Power point is the presentation package. This application software is developed by Microsoft Corporation. It is used to make slideshow, design, & formatting, set animation, sound in particular slide. This is mostly use in display project overview, display program on monitor or projector. How to open Power Point? • Go to start menu • Choose program • Click on power point How to create slide ?  • Click on slide • Type required text How to create duplicate slide ? • Select slide • Go to Insert menu • Click on duplicate slide How to remove slide from presentation ? • Select slide which you want to remove • Go to edit menu • Click on delete slide How to remove slide object ? • Select slide • Go to edit menu • Click on clear How to arrange slides ? • Go to view menu • Click on slide sorter • This display slide sorter window, • Hold mouse & drag up to target place. How to display slide in full screen ? • Go to vi...

MS-Word Introduction Ms-Word is an advanced word processing program, developed by Microsoft Corporation USA. It is a family member of Ms-Office group. With the help of this program we can create any type of documents report, thesis, designing & news paper etc.  It also save the document for future use with revision facility. How to open Ms-Word ? • Click on start menu • Choose program • Click on Ms-Word OR • Click on start menu • Click on search box • Type msword • Press enter  File Menu New :- To create a new blank document. • Go to file menu • Click on new command • Click on blank document Or • Click shortcut key: Ctrl+N Open:- To open saved file. • Go to file menu • Click on open button • Then display small dialog box. • Choose required file • Click on open button OR • Click shortcut key: Ctrl+O Save:- To save current document for future use, • Go to file menu • Click on save command • Then display small dialog box, • Type file ...

How to earn google play balance from play store: This video describes you how to earn ply pints and how to redeem it to play balance. To earn google play balance you need to change your play store location to USA. If you don't know how to change play store location to USA then comment down and I will make a video for you. Thank you.

Coronaviruses are group of RNA viruses that can causes diseases in animal. And it can also causes diseases in human. COVID-19 is caused by the virus SARS-CoV-2. The first human cases of COVID-19 were identified in Wuhan, China. The disease, which started in China, has spread to many countries around the world. Due to which human life has been affected. There are no specific vaccines or medicines for COVID-19. But thousands of scientists around the world are trying to find vaccine and medicine. The disease affects people of all age groups, but especially people over the age of 60 and people with diabetes, heart disease, hypertension, respiratory diseases, and cancer are at greater risk. The disease, which started at the end of 2019, has not yet been brought under control and is spreading to many countries around the world. It is spreading more and more in Nepal as well. The disease has killed millions of people around the world. People have lost their jobs due to this disease.  Whic...

Blood Blood is composed of several kinds of cells (occasionally called corpuscles); these formed elements of the blood constitute about 45% of whole blood. The other 55% is blood plasma, a fluid that is the blood's liquid medium, appearing yellow in color. The normal pH of human arterial blood is approximately 7.40 (normal range is 7.35-7.45), a weak alkaline solution. Blood that has a pH below 7.35 is acidic, while blood pH above 7.45 is alkaline. Blood pH along with arterial carbon dioxide tension (PaCO.) and HCO, readings are helpful in determining the acid-base balance of the body. The respiratory system and urinary system normally control the acid-base balance of blood as part of Mammalian blood homeostasis. Blood is about 7% of the human body weight, (1) so the average adult has volume of about 5 liters, of which 2.7-3 liters is plasma. Human blood density is around 1060 kg/m³ (2) The combined surface area of all the red cells in the human body would be roughly 2,000 times as...

  Asia Key highlights : • Word biggest continent (29.9%) • Highest population (59.69%-2010 AD) • Continent of heterogeneity • Biggest river – Yangtze • Largest country – China • Smallest country – Maldives • Landlocked country – 12 ( Biggest landlocked country - Kazakhstan ) • Highest peak – Mount Everest (8848 m) • Lowest place – Dead Sea • Biggest glacier – Siachen There are 48 countries in Asia they are as follows: 1. Afghanistan - Kabul 2. Armenia - Yerevan 3. Azerbaijan - Baku 4. Bahrain - Manama 5. Bangladesh - Dhaka 6. Bhutan - Thimphu 7. Brunei - Bandar Seri Begawan 8. Cambodia (Kampuchea) - Phnom Penh 9. China - Beijing 10. East Timor - Dili 11. Georgia - Tbilisi 12. India - New Delhi 13. Indonesia - Jakarta 14. Iran - Tehran 15. Iraq - Baghdad 16. Israel - Jerusalem 17. Japan - Tokyo 18. Jordan - Amman 19. Kazakhstan - Nursultan 20. Kuwait - Kuwait city 21. Kyrgyzstan - Bishkek 22. Laos - Vientiane 23. Leba...

Rock The solid and hard material on the surface of the earth is called rock. Most of the earth's surface is made up of rocks. Rock is also found at the bottom of the sea and in the lower part of the frozen land. The mountains around us are made up of rocks. Stream banks and surrounding areas are also made of rock. Soil is formed by breaking rock into samll pieces. So small pieces of rock are found in the soil. Rock Structure Rocks come in a variety of shapes and colors. From the smallest stone to the smallest tumour are rocks. The gravel and sand used to build roads and houses are also small forms of rock. Rocks are made up of a variety of elements. The amount of elements in a rock varies.  Physical Properties of Rock Structure Some rocks are made up of large particles. And some rocks are made up of leaves.  Rocks are also made up of very small particles. Large-grained rocks become rough. Rocks made up of many fine grains are slippery. Hardness Rocks are both hard and s...