Thursday, June 18, 2009

Sources of energy

Solar energy
Sun is an inexhaustible and pollution-free source of energy, called solar energy. It is estimated that solar radiations directly falling on the earth are to 170 trillion kilowatts and only eight days of sunshine are equal to all the available energy in the world put together. It can be used for direct heating or suns heat is converted into electricity called thermal or photovoltaic conversion’s number of solar equipments are at present some of them are solar heaters, solar cookers, solar pumps,etc.

Wind energy
Wind energy is being used for centuries to run the wind mills for grinding grains and pump water in certain areas especially in the coastal areas.

Tidal energy
Tidal waves of the sea can be used to turn combines and generate electricity called tidal energy. The tidal energy can be harnessed by consuming a tidal barrage.

Hydropower
Hydropower is the electrical energy produced from the kinetic energy of water falling from a height, so it is called hydro electrical energy, Dams are very helpful in producing such energy.

Geo-thermal energy
The energy used from hot rocks present inside the earth is called Geo-thermal energy

Biomass energy
Biomass is the solid organic matter like wood, dung, agriculture, sewage, waste, energy plants, and petrol-plants like eucalyptus.
The biomass can be decomposed by bacterial fermentation to obtain certain fuel sources which may be liquid or gases.

Sunday, February 24, 2008

Uranus

Uranus (pronounced /'j??r?n?s/, /j?'re?n?s/) is the seventh planet from the Sun and the third-largest and fourth-most enormous planet in the solar system. It is named after the earliest Greek deity of the sky (Uranus, ???a???), the father of Kronos (Saturn) and grandfather of Zeus (Jupiter). Uranus was the first planet exposed in modern times. Though it is visible to the naked eye like the five classical planets, it was never familiar as a planet by ancient observers owed to its dimness. Sir William Herschel announces its discovery on March 13, 1781, growing the known boundaries of the solar system for the first time in current history. This was also the first discovery of a planet complete using a telescope.

Uranus and Neptune have internal and atmospheric compositions diverse from those of the larger gas giants Jupiter and Saturn.

Sunday, February 17, 2008

Pomegranate

The Pomegranate (Punica granatum) is a fruit-bearing deciduous shrub or tiny tree growing to 5–8 m tall. The pomegranate is native to the region from Afghanistan, Pakistan, and Iran to the Himalayas in northern India and has been enlightened and naturalized over the whole Mediterranean region and the Caucasus since antique times. It is widely cultivated throughout Armenia, Azerbaijan, Iran, and India, the drier parts of Southeast Asia, Peninsular Malaysia, the East Indies, and tropical Africa. Introduced into Latin America and California by Spanish settlers in 1769, pomegranate is now cultivated mostly in the drier parts of California and Arizona for its fruits exploited commercially as juice products in advance in popularity since 2001. In the global functional food industry, pomegranate is included among a novel category of exotic plant sources called super fruits.

In the Northern Hemisphere, the fruit is classically in season from September to January. In the Southern hemisphere, it is in period from March to May.

Sunday, February 10, 2008

Building

Buildings provide numerous needs of society. The human body can be continued and may effectively function only within a limited range of climatic conditions such as temperature, humidity, moisture, sunlight, and amount of oxygen and pollutants in the air. Along with access to food and drinking water, the need to make places that are protected from the outdoors and where one can happily live, work, eat, sleep, have children or engage in leisurely activities has always been a top concern for humans.

A building as a security represents a physical division of the human habitat into the inside (a place of comfort and safety) and the outside (a place that at times may be harsh and harmful). Humans have a strange drive to reproduce on their lives and express themselves through art. Ever since the first cave paintings, the buildings and everything on, inside and near buildings have become objects of creative expression. In recent years, attention on sustainable planning and building practices has improved in the U.S.

Sunday, February 03, 2008

Carrot

The carrot (Daucus carota subsp. sativus) is a root vegetable, usually orange or white, or pink in color, with a crispy texture when fresh. The fit for eating part of a carrot is a taproot. It is a cultured form of the wild carrot Daucus carota, national to Europe and southwestern Asia. It has been bred for its very much irritated and more palatable, less woody-textured edible taproot, but is still the similar species.

It is a biennial plant which grows a rosette of leaves in the spring and summer, while building up the plump taproot, which stores big amounts of sugars for the plant to flower in the second year. The crest stem grows to about 1 m tall, with an umbel of white flowers.


Carrots can be eaten raw, whole, chopped, grate, or extra to salads for color or texture. They are also frequently chopped and boiled, fried or steamed, and cooked in soups and stews, as well as fine baby foods and choose pet foods. A well familiar dish is carrots julienne. Grated carrots are used in carrot cakes, as healthy as carrot puddings, an old English dish consideration to have originated in the early 1800s.

Sunday, January 27, 2008

Relief print

Relief print is an image fashioned by a printmaking process, such as Stencil printing, where the areas of the matrix (plate or block) that are to show printed black (typically) are on the original surface; the part of the matrix that are to be blank (white) having been cut away, or otherwise removed. Printing the image is therefore a relatively simple matter of inking the face of the matrix and brings it in firm contact with the paper; a printing-press may not be needed as the back of the paper can be rubbed or pressed by hand with a simple tool. It's the BEST way to repeat an IMAGE several times without messing up.

Sunday, January 20, 2008

Cricket ball

Cricket balls are made from a core of cork, which is coated with tightly wound string, and covered by a leather case with a slightly raised sewn seam. The covering is constructed of four piece of leather shaped similar to the peel of a quartered orange, but one hemisphere is rotated by 90 degrees with respect to the other. The "equator" of the ball is stitch with string to form the seam, with a total of six rows of stitches. The remaining two join connecting with the leather pieces are left unstitched.

For men's cricket, the ball must weigh between 5.5 and 5.75 ounces (155.9 and 163.0 g) and determine between 8 13/16 and 9 in (224 and 229 mm) in circumference. Balls used in women's and youth matches are a little smaller.