Monday, September 17, 2007

Biotic pollination

It occurs when pollination is mediated by an organism, termed a pollinator. Entomophily, pollination by insects, often occur on plants that have urbanized blue petals and a strong scent to attract insects such as, bees, wasps and rarely ants (Hymenoptera), beetles (Coleoptera), moths and butterflies (Lepidoptera), and flies (Dipteral). In Zoophily, pollination is done by vertebrates such as birds and bats, mainly, hummingbirds, sunbirds, spider hunters, honeyeaters, and fruit Bats. Plants modified to this strategy tend to develop red petals to attract birds and rarely develop a scent because few birds have a sense of smell.

Monday, September 10, 2007

Rainbow

Rainbows are optical and meteorological phenomena that reason of a spectrum of light to appear in the sky when the Sun shines onto droplets of moisture in the Earth's atmosphere. They take the form of a multicolored arc, with red on the external part of the arch and violet on the inner section of the arch. More rarely, a secondary rainbow is seen, which is a second, fainter arc, outside the primary arc, with colours in the differing order, that is, with violet on the outside and red on the inside.

A rainbow spans a permanent spectrum of colours. Traditionally, however, the chain of colours is quantized. The majority cited and remembered sequence, in English, is Newton's sevenfold red, orange, yellow, green, blue, indigo and violet. "Roy G. Biv" and "Richard of York Gave Battle In Vain" are admired mnemonics.

Though rainbows are bow-shaped in most cases, there are also phenomena of rainbow-colored flooring in the sky: in the shape of stripes, circles, or even flames

Tuesday, September 04, 2007

water taxi

A water taxi or river taxi or aquatically disposed taxi is a boat used for public transportation in cities with plentiful water channels. Many cities, including New York City, Boston, Baltimore, Fort Lauderdale, Winnipeg, Vancouver, London, and Tokyo have planned water taxis that operate in a similar manner to ferries or buses. Others, like Venice, have for-hire boats like to traditional taxis. Venice also has a vaporetto or waterbus system that operates in the same way to American "water taxis" (image).
Water taxis also activate in cottage areas where some cottages are available only by water. Visitors can drive to a local marina and take a water taxi to the final purpose.
On March 6, 2004, a "Seaport Taxi," a water taxi service operated by the Living Classrooms Foundation, capsized through a storm near Baltimore's Inner Harbor; 5 passengers died in the accident.

Monday, August 27, 2007

Tomato

The tomato (Solanum lycopersicum) is a plant in the Solanaceae or nightshade family, as are its close cousin’s tobacco, chili peppers, potato, and eggplant. The tomato is subject to Central, South, and southern North America from Mexico to Peru. It is a perennial, often grown outdoors in temperate climates as an annual, typically attainment to 1–3 m (3 to 10 ft) in height, with a weak, woody stem that often vines over other plants.

The leaves are 10–25 cm long, pinnate, with 5–9 leaflets, each leaflet up to 8 cm long, with a jagged margin; both the stem and leaves are thickly glandular-hairy. The flowers are 1–2 cm across, yellow, with five sharp lobes on the corolla; they are borne in a cyme of 3–12 together. The word tomato derives from an expression in the Nahuatl language, tomatl. The exact name, lycopersicum, means "wolf-peach" compare the related species S. lycocarpum, whose scientific name means "wolf-fruit", common name "wolf-apple".

Tuesday, August 21, 2007

Egypt

Egypt is officially the Arab Republic of Egypt, is a country in North Africa that includes the Sinai Peninsula, a ground bridge to Asia. Covering a region of about 1,001,450 square kilometers (386,560 square miles), Egypt borders Libya to the west, Sudan to the south, and Israel and the Gaza Strip to the northeast; on the north and the east are the Mediterranean Sea and the Red Sea, correspondingly.

Egypt is the fifteenth most crowded country in the world. The huge majority of its 78.8 million people (2006) live close to the banks of the Nile River (about 40,000 km² or 15,450 sq miles) where the only arable agricultural land is found. Large areas of land form part of the Sahara Desert and are sparsely inhabited. Around half of Egypt's residents live in urban areas, with the majority spread across the densely populated center of greater Cairo (the largest city in Africa and the Middle East), Alexandria and other major towns in the Nile Delta.

Egypt is famous for its very old civilization and some of the world's most ancient and important monuments, including the Giza Pyramids and the Great Sphinx of Giza; the southern city of Luxury contains a particularly large number of ancient artifacts such as the Karnak Temple and the Valley of the Kings. Nowadays, Egypt is extensively regarded as a main political and cultural centre of the Middle East

Monday, August 13, 2007

Blazer

A blazer or boating jacket is a kind of jacket, generally double-breasted even though single-breasted blazers have become more general in recent times. A blazer looks like a suit jacket except for that it generally has patch pockets with no flaps, and metal shank buttons. A blazer's cloth is usually of a resilient nature as it is used in schools and was used for sport. They frequently form part of the uniform dress of bodies, such as airlines, schools, yacht or rowing clubs, and private security organizations. As sporting dress has become more modified to the activity, the blazer has become limited to clubs' social meetings. Generally, blazers are navy blue, but nearly every color and mixture of colors has been used, particularly by schools and sporting organizations.

Tuesday, August 07, 2007

Infrared

Infrared (IR) emission is electromagnetic emission of a wavelength longer than that of noticeable light, but shorter than that of radio waves. The name means "below red", red being the color of detectable light of longest wavelength. Infrared radiation spans three instructions of magnitude and has wavelengths between about 750 nm and 1 mm.

These divisions are suitable by the different human response to this radiation: near infrared is the area closest in wavelength to the radiation detectable by the human eye, mid and far infrared are gradually further from the visible regime. Other definitions follow different physical mechanisms and the newest follow technical reasons .Unfortunately the international standards for these specifications are not currently obtainable.

The boundary between visible and infrared light is not precisely defined. The human eye is markedly less responsive to light above 700 nm wavelength, so longer frequencies make irrelevant contributions to scenes illuminated by common light sources. But particularly strong light (e.g., from lasers, or from bright daylight with the visible light removed by colored gels can be detected up to approximately 780 nm, and will be apparent as red light. The onset of infrared is defined at different values typically between 700 nm and 780 nm.