The microwave oven was invented after a researcher walked by a radar tube and when a chocolate bar in his pocket melted.
The spacecraft. Voyager 2, launched in 1977 by NASA (USA) visited all the four planets-Jupiter, Saturn, Uranus and Neptune-between 1979 and 1989.
Blu-ray, the new format for DVD's, uses a blue laser instead of the traditional red laser seen in current CD and DVD players and allows up to 27 GB of data to be stored in a single layer of a DVD.
In Western Australia, there is a mining conveyor belt that stretches over 29 km.
The USA navy has over 74 armed submarines, the greatest number by any country. The entire submarine fleet is nuclear - powered, including more than 50 Sea Wolf and Los Angeles class a attack ships, as well as 18 Ohio class ballistic missile 8 carriers.
To make a digital recording, a device called an analogue-to- digital converter divides the vibrations into 44,100 segments for each second of sound.
Pressure rises as you go deeper in the ocean. This is because the water becomes dense and the number of water molecules increases. The water pressure at 1000 m below surface is equivalent to 7 elephants standing on a dinner plate.
As a light source gets hotter, its colour changes from red to yellow and white to blue.
The Hydrogen Bomb (H-Bomb) that exploded at Novaya Zemlaya, the third largest island of Europe in Russian federation in 1961, released 10,000 times more energy than the bombs dropped on Hiroshima in Japan, in 1945.
The nuclear accident of Chernobyl, (a city in Ukraine) on 26th April 1986 released about 50 million curies of radiation. Large amounts of radioactivity escaped and spread by wind over Europe and caused a permanent evacuation of more than 3, 50, 000 people of Belarus. More than 10,000 of them have since died.
