Famous Articles: page 14
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Ted Turner
Ted Turner was born in November 19, 1938 in Cincinnati, OH and he is a famous film/tv producer. He is well known also for his collaboration with several televisions: WTBS,CNN,TNT and many others. He is one of the richest persons in the world having a net worth of $2.0 billions. As an occupation...

Famous Articles: page 14

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What is the Doppler effect?

What is the Doppler effect?

You will have noticed that as a car travels quickly towards you, the sound of its engine gets higher, then becomes deeper after the car has passed by. This is called the Doppler effect....

What is an echo?

What is an echo?

Like light, sound can be reflected from certain surfaces. Hard surfaces such as rock or the side of a building reflect sound well; as the sound bounces back you hear an echo. The delay...

What is sound?

What is sound?

Sound is a form of vibration passing through the air or some other material. Sound travels in the form of waves but, unlike electromagnetic waves, sound waves cannot pass through a...

What are lasers?

What are lasers?

Lasers are devices that produce a narrow beam of very strong light. Lasers amplify light by causing photons to be bounced back and forth in a substance (solid, liquid or gas), which...

What are isotopes?

What are isotopes?

The nucleus of an element normally has a fixed number of protons and neutrons. Some elements exist in different forms, however, with varying numbers of neutrons in their nuclei. A...

Radioactive healing

Radioactive healing

In a nuclear reactor, uranium or plutonium undergoes fission, releasing huge amounts of energy. Graphite rods absorb some of the energy and prevent the reaction 'running away' and causing...

What is a nuclear reactor?

What is a nuclear reactor?

A nuclear reactor is used to control nuclear fission. In most reactors, uranium is encased in metal tubes that are inserted into the reactor. The tubes are surrounded by a moderator...

Atom bomb

Atom bomb

The atom bomb is such a powerful weapon that it has only been used in anger twice, near the end of World War II, and even testing has now been abandoned. The technology to produce atomic...

How do nuclear power stations work?

How do nuclear power stations work?

Once nuclear fission takes place inside a nuclear reactor, the chain reaction has to be controlled, or moderated. The reactor's core of uranium is surrounded with a substance that slows...

How is nuclear energy produced?

How is nuclear energy produced?

Nuclear energy is produced by changes in the nucleus of the atom of a radioactive element such as uranium or plutonium. This process is called nuclear fission. The nucleus is split...

How do computers work?

How do computers work?

A computer is a device for processing information very rapidly and accurately. It processes words, pictures, sounds and numbers, and some computers can make billions of calculations...

What is a printed circuit?

What is a printed circuit?

Any modern electrical device requires a huge number of connections to join together all the small components needed for it to work effectively. At one time these connections were made...

How does radio communication work?

How does radio communication work?

Radio signals are transmitted using a carrier wave. A radio transmitter changes, or modulates, this radio wave in order to convey information. In AM radio the height of the carrier...

What are radio waves?

What are radio waves?

Radio waves form part of the electromagnetic spectrum. They are not part of the visible spectrum of light, and they have even longer wavelengths than infrared radiation. Radio waves...

How do animals make use of magnetic forces?

How do animals make use of magnetic forces?

Many animals migrate for very long distances, but they arrive back at their birthplace in order to breed. This behavior has puzzled scientists for many years, but they have now found...

How does a compass work?

How does a compass work?

The magnetized needle of a compass tries to align itself towards the Earth's field of magnetic force. The magnetized needle balances on a pointed pin or floats on oil to allow it to...

Is the Earth a magnet?

Is the Earth a magnet?

The Earth is actually a huge magnet, with a magnetic north and a magnetic south pole. These poles are not quite the same as the true geographical poles, and they wander about slightly....

How does electricity produce heat and light?

How does electricity produce heat and light?

A good conductor such as copper has only very low electrical resistance. It does not get very hot when electricity flows though it, making copper suitable for household wiring. Other...

How do batteries work?

How do batteries work?

Batteries produce electricity by means of chemical action. A battery contains two different conductors, or electrodes. Usually, one of these is the metal case of the battery. The...

How is electricity made?

How is electricity made?

Energy cannot be created. An electrical generator is simply a means of converting mechanical energy into electrical energy. In its simplest form, a generator spins coils of wire in...

What is an insulator?

What is an insulator?

Some materials do not have the loosely attached electrons that are needed to conduct electricity - these substances are called insulators. Rubber, most plastics, ceramics and glass...

Why don't people fall off the Earth?

Why don't people fall off the Earth?

Gravity is the force that holds us on the Earth. lt is also the force that keeps the Earth from flying off into space as it orbits the Sun. The larger the mass of any object, the more...

Why do rainbows form?

Why do rainbows form?

Rainbows are formed when sunlight falling on raindrops is split into the different colors of the spectrum (range) of light. Sunlight is really a mixture of all the colors of the spectrum...

What are microwaves?

What are microwaves?

Microwaves are a form of radiation. They can pass through things that would block ordinary radio waves, such as rain and fog. Microwaves can also be focused and sent in a narrow beam...


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