Sound Wave

Sound Wave : Sound waves are longitudinal mechanical wave. According to their frequency range, longitudinal mechanical waves are divided into the following categories :

(1) Audible or Sound Waves : The longitudinal mechanical waves which lie in the frwquency range 20 Hz to 20000 Hz are called audible or sound waves.
These waves are sesitive to human ear. These are generated by the vibrating bodies such as tuning fork, vocal cords etc.

(2) Infrasonic Waves : The longitudinal mechanical waves having frequencies less than 20 Hz are called Infrasonic.
These waves are produced by source of bigger size such as earth quakes, volcanic eruptions, ocean waves and by elephants and whales.

(3) Ultrasonic Waves : The longitudinal mechanical waves having frequencies greater than 20000 Hz are called ultrasonic waves.
Human ear can not detect these waves. But certain creatures like dog, cat, bat, mosquito can detect these waves. But not only detect but also produce ultrasonic.

Egyption Civilization

Egyption civilization : Egypt is called the 'Gift of the Nile'. Historians divided the history of Egypt into three periods; the Old Kingdom, the Middle Kingdom and the New Kingdom.

The Old Kingdom is also called the 'Age of the Pyramids'. The Egyption king was called the pharaoh. The Egyptions were the worshipper of the nature and sun was their most important god.

Pluto is not a Planet now

On the basis of the new definition of planet given by the IAU (International Astronomical Union), the world's top institution on space science research, leading astronomers participating in IAU's meet at Prague (Czech Republic) on August 24, 2006, declared that Pluto would no longer remain a planet.

Astronomers

Under the IAU's new guidlines, the number of planets in the Solar System has thus been reduced from nine to eight. Its merits mentioning here that, prior to this decision, Pluto had been holding the planetary status since its discovery in 1930 by Cyde Tombaugh.


Now, with the omission of Pluto from the Solar System, its membership has been restricted to the eight "classical" planets, namely Mercury, Venus, Earth, Mars, Jupitor, Saturn, Uranus and Neptune.

Solar System

Weeks after it was demoted to a sub-planetary status, Pluto was given a new name to reflect its new status as a dwarf planet in September 2006. The former 9th planet was assigned the asteroid number 134340 by the Minor Planet Centre (MPC), the official organisation responsible for collecting data about asteroids and comets in our Solar System.

Top Intelligence Agencies of the World

»» Intelligence Agencies of the World

»» China : Central External Liaison Department

»» South Africa : Bureau of State Security (B.O.S.S)

»» Pakistan : Inter Services Intelligence (ISI)

»» U.S.A. : Central Intelligence Agencies (CIA), Federal Bureau of Investigation (FBI)

»» Iraq : Al Mukhbarat



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Quantum Computer

Quantum Computer : The development of this type is in final stage. Probably Quantum Computers will be more advanced than that of human brain.

In Quantum Computers Q-Bit will be used in lieu of Binary Bits.

Quantum Computers