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Tutor profile: Nitin A.

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Nitin A.
Tutor for 9 years
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Questions

Subject: Computer Networking

TutorMe
Question:

What are the applications of Computer Networks?

Inactive
Nitin A.
Answer:

1. Information: One of the applications of computer networks is the ability to provide access to remote information. • Pay bills; carry out transactions on bank accounts etc. • Shop from home by inspecting the catalogs of thousands of companies available online. • Ask the newspaper for full information about your interesting topics such as corrupt politicians, big fires, football and so on. • Access information about health, science, art, business, cooking, sports, travel, and government and so on. All this is available on the information systems like the World Wide Web (WWW). 2. Communication: The popular application of computer networks is electronic mail or e-mail which widely used by hundreds of people to send and receive text messages. With real-time e-mail, remote users can communicate even by seeing and hearing each other at the same time. It is also possible to have virtual meetings called videoconferencing among remote users. 3. Entertainment: A huge and growing application is entertainment. It entertains people by allowing video demand, and has multiple real-time games etc.

Subject: Computer Graphics

TutorMe
Question:

What are the differences between vector graphics and raster graphics?

Inactive
Nitin A.
Answer:

The differences between vector graphics and raster graphics can be elaborated as follows: 1. Raster or Bitmap images are resolution dependent due to which its not possible to increase or decrease their size without sacrificing on image quality. While vector based image are not dependent on resolution. The size of vector image image can be increased or decreased without affecting image quality. 2. Raster or bitmap images are always rectangular in shape, Vector image, however, can have any shape. 3. Unlike raster image, vector image can’t be used for realistic images. This is because vector images are made up of solid color areas and mathematical gradients, so they can’t be used to show continuous tones of a colors in a natural photograph.

Subject: Physics

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Question:

How can we illustrate the law of conservation of momentum?

Inactive
Nitin A.
Answer:

Law of conservation of momentum states that : The total momentum of an isolated system of interacting particles is conserved. An example of a gun firing a bullet can be used for illustrating the law of conservation of momentum. Momentum is the object's resistance to change in motion. If the motion is along a straight line it is linear momentum and if it is rotational motion we call it as angular momentum. If the bullet has mass mb and speed vb out of the gun, it has momentum pb given simply by pb = mb * vb in the forward direction. To balance this momentum (and keep the net momentum of the bullet-gun system zero), the gun recoils with momentum in the opposite direction: pg = -pb, or mg * vg = -mb * vb Conservation of momentum is the law that is held true when the gun is fired and a "kick" is felt. When a bullet is fired from a gun, total momentum before is zero since nothing is moving. After firing the bullet there is a momentum in the forward direction. The gun must therefore have the same magnitude of momentum but in the opposite direction so that they cancel each other out leaving the total momentum still equal to zero. For this reason the gun must have a recoil velocity after the bullet is fired

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