Space

Space is the boundlessthree-dimensional extent in which objects and events have relative position and direction. From the perspective of an Earthling, outer space is a zone that occurs about 100 kilometers (60 miles) above the planet. There is no air. Further, space is a vacuum, meaning that sound cannot carry because molecules are not close enough together to transmit sound between them. Space is not empty. There are planets, stars, galaxies, black holes, in space. Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as spacetime.

Read More

The fastest plane

Human has  discovered plane. Human has conquered distance. Now human has built fastest plane.The Falcon hypersonic technology vechile-2 is the fastest plane ever built by the human. It fly faster than supersonic Concorde. It would withstand temperatures of almost 2,000 degree C. The US Defense agency will launch the Falcon HTV-2. First, they will set it on the back of a rocket. Then they will launch both into the space. After launching it into the space the will detach the plane. Then the plane Falcon will fly towards the earth. The Falcon was born in 2003. It was a part of a military project.

Read More

The Aka airplane

Human beings has discovered so many things that let us conquered the world. Human conquered the distance on earth by discovering wheels. But at present we can travel more faster by plane. The first ever plane were made by the wright brothers. They made the first experiment on flying in a plane. In the experiment a machine carried a man a rose above by its own power. It was the first plane made by the human. The machine was called "Aka airplane". At present planes travel faster than the sound. So the sky's limit now.

Read More

The Bullet train

 

The Bullet train is one of the high-speed train. The world is changing. Technology is improving. So train has become faster. The bullet train is a high-speed train service in japan. It started operation in 1964 on limited route. But at present, most major cities of japan come under the network. The bullet trains high-speed is 300km/h(186m/h). It plans to increase speed up to 320 km/h. Ina test run the speed was 581 km/h.

Read More

Artificial satellites

Satellites revolve around the earth from space. Because of the gravity of the Earth, it turns around. So it does not cost any fuel to keep it in space. We know that the Earth revolves around its axis for twenty four hours. If the satellite is to turn the earth once in twenty-four hours, then it will seem from the Earth that it remains fixed in one place in the sky. Such satellites are Geo stationery satellites. Such satellites can not be kept at any height. There are two problems with satellites. A large antenna is needed to send a signal to the satellite. And the next problem is that the signal that is sent from the Earth is faster but it takes a little longer to exceed the distance. There is no other problem.

Read More

Spreadsheet

Human beings have to keep the account of different subjects from the ancient times. Now 50 years ago, the paper pens were the main means of accounting and preservation. This work has become easier now in the era of science. It is now calculated through calculator. The computer was discovered only for calculation. It is now possible to do these work through various computer software. These software are spreadsheet software. The lexical meaning of spreadsheet is the spread of large-scale works. Software used to protect the financial accounts of the business organization. There are some popular software spreadsheet - Visicalc , Microsoft Excel , Open office Calc , Kspread. Microsoft Excel is used by everyone.

Read More

Optical fiber

Optical fiber is a very thin plastic glass fiber. Optical fiber is sent to the light signal. Electric signals are first turned into light signals. The light signal is sent through optical fiber. On the other side, light signals are converted into electrical signals, thus sending signals through optical fiber. A lot of signals are possible through optical fiber. Recently, optical fiber communication has been developed so that all the countries of the world are connected with optical fiber networks.

Read More