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Wednesday, February 16, 2011


The atom is a basic unit of matter that consists of a dense, central nucleus surrounded by a cloud of negatively charged electrons. The atomic nucleus contains a mix of positively charged protons and electrically neutral neutrons (except in the case of hydrogen-1, which is the only stable nuclide with no neutrons). The electrons of an atom are bound to the nucleus by the electromagnetic force. Likewise, a group of atoms can remain bound to each other, forming a molecule. An atom containing an equal number of protons and electrons is electrically neutral, otherwise it has a positive charge (electron deficiency) or negative charge (electron excess) and is an ion. An atom is classified according to the number of protons and neutrons in its nucleus: the number of protons determines the chemical element, and the number of neutrons determines the isotope of the element

Monday, February 14, 2011


The most cumbersome task is to pack and move to a new place, be it your residence or workplace. But with Marshal Packers and Movers, you don't need to worry a single bit.We are proud to introduce ourselves as one of the reputed firms in the movement of household and commercial goods.Our Head Office is at Mumbai and the branches are at Ahmadabad, Baroda, Bangalore, Bhopal, Chennai, Chandigarh, Coimbatore, Cochin, Delhi, Dehradoon, Hyderabad, Jaipur Kolkata, Kanpur, Nagpur, Pune, Surat and Vapi. We offer a highly personalized service, which several firms find difficult to compete with. We understand that your possessions are your assets. Hence, it is obvious that transferring your goods from one place to another can cause considerable tension in your mind. We provide our services in household relocation and also in corporate transfers. All the elements of services rendered are discussed in detail with our clients during our preliminary meeting, ensuring a trouble free and comfortable relocation.
Marshal Packers and Movers, each client is precious with whom it would like to have the best experience.


Laser, a device that produces and amplifies light. The word laser is an acronym for Light Amplification by Stimulated Emission of Radiation. Laser light is very pure in color, can be extremely intense, and can be directed with great accuracy. Lasers are used in many modern technological devices including bar code readers, compact disc (CD) players, and laser printers. Lasers can generate light beyond the range visible to the human eye, from the infrared through the X-ray range. Masers are similar devices that produce and amplify microwaves.


A Black Hole is an extremely dense celestial body that has been theorized to exist in the universe. The gravitational field of a black hole is so strong that, if the body is large enough, nothing, including electromagnetic radiation, can escape from its vicinity. The body is surrounded by a spherical boundary, called a horizon, through which light can enter but not escape; it therefore appears totally black.


A curved piece of glass resting on a flat piece of glass creates colorful concentric bands, called Newton’s Rings. The rings are caused by light waves reflecting from the two surfaces and interfering, or combining, with each other. A band of color appears wherever the distance between the two pieces of glass causes light of that color to interfere constructively, making the waves bouncing off the two surfaces reinforce each other. At these places, light waves of other colors interfere destructively and tend to cancel each other out.

Sunday, February 13, 2011


Love is the emotion of strong affection and personal attachment.[1] In philosophical context, love is a virtue representing all of human kindness, compassion, and affection. In some religious contexts, love is not just a virtue, but the basis for all being, as in the Roman Catholic phrase, "God is love"[2]. Love may also be described as actions towards others (or oneself) based on compassion.[3] Or as actions towards others based on affection


A scientist in a broad sense is one engaging in a systematic activity to acquire knowledge. In a more restricted sense, a scientist is an individual who uses the scientific method.[1] The person may be an expert in one or more areas of science.[2] This article focuses on the more restricted use of the word. Scientists perform research toward a more comprehensive understanding of nature, including physical, mathematical and social realms.


Science (from the Latin scientia, meaning "knowledge") is an enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the world.[1][2][3][4] An older meaning still in use today is that of Aristotle, for whom scientific knowledge was a body of reliable knowledge that can be logically and rationally explained (see "History and etymology" section below).[5]
Since classical antiquity science as a type of knowledge was closely linked to philosophy. In early modern times the two words, "science" and "philosophy", were sometimes used interchangeably in the English language. By the 17th century, "natural philosophy" (which is today called "natural science") could be considered separately from "philosophy" in general.[6] However, "science" continued to be used in a broad sense denoting reliable knowledge about a topic, in the same way it is still used in modern terms such as library science or political science.
Science is "[i]n modern use, often treated as synonymous with ‘natural and physical science’, and thus restricted to those branches of study that relate to the phenomena of the material universe and their laws, sometimes with implied exclusion of pure mathematics. This is now the dominant sense in ordinary use."[7] This narrower sense of "science" developed as a part of science became a distinct enterprise of defining "laws of nature", based on early examples such as Kepler's laws, Galileo's laws, and Newton's laws of motion. In this period it became more common to refer to natural philosophy as "natural science". Over the course of the 19th century, the word "science" became increasingly associated with the disciplined study of the natural world including physics, chemistry, geology and biology. This sometimes left the study of human thought and society in a linguistic limbo, which was resolved by classifying these areas of academic study as social science. Similarly, several other major areas of disciplined study and knowledge exist today under the general rubric of "science", such as formal science and applied science.[8]

  A robot is a virtual or mechanical artificial agent. In practice, it is usually an electro-mechanical machine which is guided by computer or electronic programming, and is thus able to do tasks on its own. Another common characteristic is that by its appearance or movements, a robot often conveys a sense that it has intent or agency of its own.