An ‘anticyclone’ is opposite to a cyclone, in which winds move into a low pressure area. In an anticyclone, winds move out from a high-pressure area with wind direction clockwise in the northern hemisphere, anti-clockwise in the southern hemisphere. Such a high pressure area is usually spread over a large area, created by descending warm air devoid of moisture. The …

In most cars is power from the engine is used to drive either the front wheels or the back wheels. This contact with the road provides sufficient grip on all normal road surface. But when the roads surface is slippery such as when covered by snow or ice, two wheels may not get enough grip and one or both may …

It is not true that there are no tidal waves during the day. Tidal waves are the result of the gravitational pull of the moon and the sun, but the effect of the sun is much less than that of the moon. In fact, tidal waves occur twice on any day-night cycle of 24 hours — once when the moon …

In about 1500 B.C., Queen Hatshepsut of Egypt sent a fleet to the ‘Land of Punt’. No-one is sure where Punt was, but experts think the Egyptian sailors ventured out of the Mediterranean and sailed south along the coast of Africa. Astonishing voyages were also made by Arab and Chinese explorers. People from Asia reached Australia 25,000 years ago, by …

With video, you decide what to watch, you can use your television set to provide you with the films, shows, music-virtually any visual entertainment or information-of your choice. There are two systems: videotape recorders and videodisc players, each with their own particular advantages. Videotape and videocassette recorders play tapes and you can record television programmes on them as well as …

In the evening, the setting sun appears like a beautiful crimson red ball. But we all know it has not changed its color. Sunlight contains all colors. But the atmosphere on, around and over the earth contains molecules of water, vapour, dust, air and other impurities. The sunlight which passes through these media gets scattered. Our atmosphere scatters blue, violet …

These are both laboratories that fly in space. Skylab was an American space station that contained much scientific equipment. It was used in 1973 and 1974. Spacelab is the name of a series of space laboratories taken into space by the space shuttle. Astronauts aboard the shuttle use them to do scientific experiments in space.

The insect called the praying mantis may look as though it is praying, but it is very fierce! It gets its name from the way it holds its forelegs in front, of its head. But in fact it is just waiting for an insect to come along and, as soon as it is within reach, the two parts of each …

Eyebrows keep the perspiration from our forehead from running down into our eyes. The perspiration that forms when we get hot is trapped by the eyebrows and turned aside, and the moisture runs down our temples on the sides of our face, otherwise it would blur our vision and make us feel uncomfortable.

A metallic bond is characterized by free electrons and generally forms a specific geometric pattern of compact arrangement of atoms. All metals (except mercury) thus exist in a solid state at room temperature and have a specific crystal structure. Mercury belongs to the zinc group of elements in the periodic table, which comprises zinc, cadmium and mercury. They all have …