Water, inorganic ions and a large array of relatively small organic molecules (e.g. sugars, vitamins, fatty acids) account for 75−80 percent of living matter by weight. Of these small molecules, water is by far the most abundant. Each type of small...
Multimedia - Today’s most important digital requirement
It is a field concerned with the computer controlled integration of text, graphics, drawings, still and moving images, etc., where information can be represented stored, transmitted and processed digitally.There are basically two types of multimedia...
How does a Modem work?
Screeching sounds are produced from the modem while it makes its first connection. The digital signals coming from the computer to which we are connecting being are modulated into these audible sounds. The modem sends a higher–pitched tone to represent...
What is a Modem?
If you are reading this article on your computer at home, it probably arrived via modem. Modem is actually one of the most important hardware devices used in the computer especially for the purpose of networking of the internet.A Modem is nothing...
How do mobile phones work?
Mobile phones today are an absolute necessity. This was unthinkable a few years ago, when it was treated as a luxury item. Mobile phones have come a long especially in the technological and usability aspects. Today, the mobile phone itself has become...
Respiratory System
Lungs are located within our chest cavity inside the rib cage and are made of spongy, elastic tissue that stretches and constricts as we breathe. The airways that bring air into the lungs (the trachea and bronchi) are made of smooth muscle and cartilage,...
Human lungs
When we contemplate the miraculous engineering of the human lungs, we will be speechless with its incredible feats. If you had been unable to breathe for a minute, you would have given up all you owned in order to be able to breathe again. In another...
Types of lightning
1. Intra cloud Lightning2. Cloud to cloud (or) Inter Cloud Lightning3. Cloud to Ground Lightning4. Cloud to air lightning4. Anvil lightning5. Ball lightningread more.....http://www.wonderwhizkids.com/index.php/lightning
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What is Lightning farm?
It is said that the a single thunder eventually has the capacity to power up a huge city like Washington DC for 30 days with out any interruption. That's how the idea to store this power has emerged and led to the build of lightning farms which could...
What makes lightning flash?
Lightning is a not only one of the most beautiful displays in nature but also one of the most deadly natural phenomena known to us. Lightning is a flash of light in the sky, occurring during a thunderstorm and caused by a discharge of electricity, either...
Laser Light Show
A laser lighting display or laser light show involves the use of laser light to entertain audience. A laser light show may consist only of projected laser beams set to music, or may accompany another form of entertainment, typically a rock concert or...
Kidneys – Body's immaculate creation
"Can you imagine the filter that could be used in a process for more than 70 years without ever being replaced or cleaned" The paired organs known as the kidneys serve as a purification plant with which no technology can possibly compete. This extraordinarily...
Why does most ″part of the Ice bergs″ are found beneath the ocean's surface?
Let us seek the concept of density to answer this question. The densities of ice and sea water are so close in value. Remember that the density of ice is 0.92 g/mL, and the density of water is 1.0 g/mL (1.03 for salt water). This means that ice...
How do Icebergs float?
In fact, an iceberg is nothing but a giant ice cube. When you throw an ice cube in a glass of water, it will float. Floating has nothing to do with size but all with weight. So the floating of an ice cube is just the same as floating of an iceberg. read...
What gives Icebergs their Colors?
An iceberg can be many different colors, although most are blue.Once an iceberg has melted and refrozen several times, it will turn white because it has air trapped inside. Some icebergs in Antarctica are green because the ice shelves they come from...
What are Icebergs?
Ice bergs are the ones which are the solid forms of fresh water floating freely in open water. These are formed on the oceans like Arctic, North Atlantic, and Southern Oceans. Icebergs float in salt water. The size of icebergs varies widely.There...
Is the internet and WWW (World Wide Web) are the same?
People commonly use the words "Internet" and "Web" interchangeably. This usage is technically incorrect. It is common in daily conversation to abbreviate them as the "Net" and the "Web", and then swap the words interchangeably. But to be technically...
What is Internet?
Vinton Cerf, a famous American computer scientist, who is recognized as one of "the fathers of the Internet", says about the Internet, “The Internet is based on a layered, end-to-end model that allows people at each level of the network to innovate...
How does life take shape?
Life..... the very thought of it evokes curiosity, astonishment and many questions that cross our mind.. What is Life? How life came into being amidst turbulent and hostile conditions prevailing at that time on the earth?Is life so adamant and...
What is life?
There is no universal definition of life and there are a variety of definitions proposed by different scientists. Life is a condition that distinguishes organisms from inorganic matter, which is manifested by growth, reproduction and the power of adaptation...
How holograms works?
Though holography is often referred to as 3D photography, this is a misconception. A better analogy is sound recording where the sound field is encoded in such a way that it can later be reproduced. In holography, some of the light scattered from an...
Types of holograms?
Several types of holograms can be made. Transmission holograms, such as those produced by Leith and Upatnieks, are viewed by shining laser light through them and looking at the reconstructed image from the side of the hologram opposite the source....
What is Holography?
Holography (meaning writing or drawing in Greek) is the science of producing holograms. It is a technique that allows the light scattered from an object to be recorded and later reconstructed so that it appears as if the object is in the same position...
Understanding blood pressure
The force which the blood exerts on the walls of the blood vessels is called blood pressure. As the heart beats, it pumps blood through a system of blood vessels, which carry blood to every part of the body. Diastolic pressure is the pressure...
Arteries and Veins
Blood moves through many tubes called arteries and veins, which together are called blood vessels. These blood vessels are attached to the heart. The blood vessels that carry blood away from the heart are called arteries. The ones that carry blood back...
What are Valves?
Valves regulate the flow of blood in a singular direction. Each chamber has a sort of one – way valve at its exit that prevents blood from flowing backwards. When each chamber contracts, the valve at its exit opens. When it is finished contracting,...
It's amazing what the human heart can do!
The movement of the blood through the heart and around the body is called circulation and the heart takes less than 60 seconds to pump blood to every cell in your body. Blood delivers oxygen to all the body‘s cells and without oxygen these cells would...
Human Heart
Heart is located, right in the center between the two lungs and above the diaphragm and is made of a unique cardiac muscle. The narrow end of the roughly triangular heart is pointed to the left side and during working, the contraction of the heart is...
Is the gravity same at every place on the Earth?
Gravity is more at the equator and its less at poles because, the diameter of the Earth is more at the equator than at the poles. At the equator, the distance to the center is less and hence the gravity at equator is more. Similarly, the distance between...
What are the effects of gravity on human body ?
Human body is effected by the Gravity all the time. Gravitational force never gives up while pulling towards it. It doesn't discriminate between young and old. There are several parts of thebody that are effected due to the gravitational force:1. Spine:...
What is the reason behind the Earth's rotation around the Sun?
Earth is bigger than the Moon. Earth's gravity pulls on the Moon. That is why the Moon orbits, or goes around, Earth. The SUN is bigger than Earth. Its gravity makes Earth go around the Sun. On a larger scale, gravity arranges cosmic bodies into orbits...
What is Gravity?
Gravity holds your feet down to the ground because the mass of the planet Earth exerts a gravitational pull on the mass of your body. Gravity is the pulling force that holds us all down onto the Earth's surface. In fact, everything has a gravitational...
What is Global Warming?
It is the average rise in temperature of the oceans, surface and the atmosphere of the Earth. Past three decades, the mean surface temperature of the Earth was increased about 0.8°C (1.4° F). Scientists estimated that 90% of the effect is due to...
What is Geothermal Power?
Geothermal Literally means ‘Earth's heat’.The word geothermal comes from the Greek words "geo," meaning earth and "therme," meaning heat. Geothermal heat is generated from within the earth's core, some 4,000 miles below the surface.The heat is produced...
All about Human Genome
Every organism, including humans, has a genome that contains all of the biological information needed to build and maintain a living example of that organism. The traits such as brown, blue or gray eyes; black, brown or blond hair are transmitted from...
What is meant by Geomagnetic storm?
Geomagnetic storm also known as Solar storm (or) simply magnetic storm is nothing but the disturbance in the Earth's upper atmosphere due to large eruptions from the Sun's Corona. These eruptions consists of protons and electrons with few thousands...
How is gene expression regulated?
The genome of a given organism contains thousands of genes, but not all these genes need to be active at any given moment. A gene is "expressed" when it is being transcribed into mRNA (and translated into protein), and there exist many cellular...
What are Fuel Cells?
The principle of the fuel cell was discovered by Swiss scientist Christian Friedrich Schönbein in 1838. Understanding the principle, the first fuel cell was developed by Welsh scientist Sir William Grove. In 1959 that British engineer Francis Thomas...
Why birds fly in a V-formation?
The large groups of birds are particularly common in late autumn and early winter when birds migrate from their summer habitat in Canada to the warmer climate of the southern United States. Such groups of birds will typically fly in a large “V” shape...
What are fiber optics?
If you hear very clear voice over your telephone or see clear pictures, it is not just due to the quality telephone or televisions alone. The crystal clear sounds and images are due to the optical fibers that carry the information through light.Fiber...
How and When Earth was born?
As the Scientists have no concrete proof for how exactly Earth was formed, but they strongly think that it was a swirl of gas and dust some 4.6 billion years ago spreading around 15 billion miles in space.Astrologers and scientists believe that all...
What is there inside the Earth?
Many Scientists came up with their own theories till the time when Newton proposed that Earth's interior is made up of much denser material. The Density of the inner Earth is twice as that of the rocks on the surface of the Earth. This density reveals...
How come Earth is the only planet that supports life?
The only planet that supports life (as per the present knowledge of humans) is the Earth. The life supporting zone of the Earth is very small compared to the vast Universe. It is from the bottom of the ocean bed to the top of the highest mountain. Less...
What is E–Learning?
E–learning is an basically a term generally used to refer to computer–enhanced learning, although it is often extended to include the use of mobile technologies such as Personal Digital Assistants and MP3 players. It may include the use of web–based...
The Mystery of Dolphins?
One of the most commonly asked questions at Dolphin encounters is: How do you train the dolphins? In technical terms, we can train animals with a system of positive reinforcement through operant conditioning (Operant conditioning is one of the fundamental...
What are Dwarf Planets?
Dwarf planets are the ones which are very small to be considered as planets. Recently there was lot of discussion on the planet Pluto, for assigning a status of a dwarf planet.The ninth planet of the solar system, Pluto, was classified as "dwarf planet"...
Differences between DNA and RNA?
One of the most frequently asked questions about nucleic acids is: What is the main difference between DNA and RNA and chemically how they both differ from each other? Nucleic Acids are the organic compounds found in the chromosomes of living cells...
