Computer Science Tutors for Class 6 - 8 in Delhi

Alcohol is a liquid that can diffuse rapidly in water.

Zno is amphoteric oxide which shows acidic as well as basic behaviour ., it can react with acid and bases.this is why it is called amphoteric oxide.

A web page is the first page of any website,and web page is any page that opens in the browser,every home page is a web page but every web page is not a home page

Use a keeper

The best way to prevent any loss in a magnet’s magnetic ability is to store it with a keeper. A keeper is a piece of iron that is temporarily added between the north and south poles of a magnet to prevent it from demagnetizing by redirecting the magnetic field.

If a keeper is not provided with your magnet, then store your magnets on a steel sheet.

Store in pairs

Store magnets in pairs to prevent the two south or two north magnetic poles of the magnets from touching. Two poles of the same alignment should not be allowed to touch due to their magnetic field lines repelling. If the two poles continuously repel from one another, the magnet’s strength is weakened.

Store in a dry place

Magnets can corrode easily when stored in damp conditions. This can affect the magnets’ magnetism, particularly if they rust, as this will produce an air gap that stops the magnets from producing a secure bond on ferromagnetic material.

When flexible magnets become wet, the water can cause the laminate to bubble. To stop this from happening, a flexible magnet, particularly if it’s is being used as a car sign, needs to be cleaned and dried regularly.

Store in a non-ferromagnetic container

To store multiple magnets in one place you will need to place them into a non-ferromagnetic container, for example, a sealed wooden box or Tupperware. The non-ferromagnetic container helps to stop the magnet from attracting any unwanted metal debris.

Keeping the magnet’s strength

A magnet’s strength can be weakened by factors such as high temperatures and storing next to high voltage electricity. When the magnet is exposed to factors such as these for a long time, it can become demagnetized.

In most cases, except for exposure to high temperatures, a magnet’s strength can be reinstated through the use of another strong magnet.

Protecting the magnet

Magnets can have either a coating or casing to protect them from any bumps or corrosion. One form of coating for a magnet – rubber, can be replaced when it becomes torn or cracked, for example, after being left exposed to the elements whilst being used as a car magnet.

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Microsoft Excel is a programming language,

a spreadsheet developed by microsoft for windows, Macos, Android and IOS.

it is a tool for calculating all types fo calculations, draw graphs and charts (all types of graph) for analysis, pivot tables,

for sorting and storing of data in a worksheet.

The fractional distillation is adopted for the mixture where the constituents have difference in boiling points less than 25 deg C.

EXTERNAL

Basic differences between the 3rd, 4th and 5th generation computers are : 1. 3rd generation computers were called mini computers as they were small in size but 4th generation computers were called micro computers as they were very small in size. 2. In 3rd generation, Integrated circuit (I.C.) and large scale integration (LSI) was used but in 4th generation computers were using microprocessor and very large scale integration (VLSI). 3. Main memory of 3rd generation was increased in form of PROM and DRAM whereas in 4th generation as EPROM and SRAM. 4. 5th generation computers are based on Artificial intelligence (AI) technique. 5. 5th generation computers can understand and respond to spoken words or surroundings using different sensors which is the major difference between any other generation to 5th generation computers.

Internet Service Provider (ISP):

 An internet service provider (ISP) is a company that provides web access to both businesses  and consumers.

• ISPs may also provide other services such as email services, domain registration, web hosting, and browser services.
• An ISP is considered to be an information service provider, storage service provider, internet network service provider (INSP), or a mix of all of them.
• Internet use has evolved from only those with university or government accounts having access to nearly everyone having access, whether it's paid or free.
• Access has gone from dial-up connections to high-speed broadband technology.

As noted above, internet service providers primarily provide their customers access to the internet—plain access providers that just handle the traffic between the individual and the internet as a whole. But there may also be other services bundled in depending on the customer's location and availability. Some of these services include:

• Email services
• Web hosting services
• Domain registration
• Browser and software packages 

  WORLD WIDE WEB: The World Wide Web (abbreviated as the Web or WWW) is a system of Internet servers that supports hypertext to access several Internet protocols on a single interface. Almost every protocol type available on the Internet is accessible on the Web. This includes e-mail, FTP, Telnet, and Usenet News. In addition to these, the World Wide Web has its own protocol that is   Hyper Text Transfer Protocol, or HTTP.

  The operation of the Web relies primarily on hypertext as its means of information retrieval. Hyper Text is a document containing words that connect to other documents. These words are called   links and are selectable by the user. A single hypertext document can contain links to many documents. In the context of the Web, words or graphics may serve as links to other documents, images, video, and sound. Links may or may not follow a logical path, as each connection is programmed by the creator of the source document. Overall, the Web contains a complex virtual web of connections among a vast number of documents, graphics, videos, and sounds.

  Producing hypertext for the Web is accomplished by creating documents with a language called Hyper Text Markup Language, or HTML. With HTML, tags are placed within the text to accomplish document formatting, visual features such as font size, italics and bold, and the creation of hypertext links. Graphics and multimedia may also be incorporated into an HTML document. HTML is an evolving language, with new tags being added as each upgrade of the language is developed and released. The World Wide Web Consortium (W3C), led by Web founder Tim Berners-Lee, coordinates the efforts of standardizing HTML. The W3C now calls the language XHTML and considers it to be an application of the XML language standard.

  E-MAIL: Electronic mail, or e-mail, allows computer users locally and worldwide to exchange messages. Each user of e-mail has a mailbox address to which messages are sent. Messages sent through e-mail can arrive within a matter of seconds.

  A powerful aspect of e-mail is the option to send electronic files to a person’s e-mail address. Non-ASCII files, known as binary files, may be attached to e-mail messages. These files are referred to as MIME attachments.

  MIME stands for Multimedia Internet Mail Extension, and was developed to help e-mail software handle a variety of file types. For example, a document created in Microsoft Word can be attached to an e-mail message and retrieved by the recipient with the appropriate e-mail program. Many e-mail programs, including Eudora, Netscape Messenger, and Microsoft Outlook, offer the ability to read files written in HTML, which is itself a MIME type.