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Q853
How LCD Monitors Work
Liquid-crystal display
They are available in a wider range of screen sizes than CRT and plasma displays , and since they do not use phosphors, they do not suffer image burn-in .
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Q853
How LCD Monitors Work
Liquid-crystal display
LCDs are, however, susceptible to image persistence .
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Q853
How LCD Monitors Work
Liquid-crystal display
The LCD screen is more energy efficient and can be disposed of more safely than a CRT.
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Q853
How LCD Monitors Work
Liquid-crystal display
Its low electrical power consumption enables it to be used in battery -powered electronic equipment.
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Q853
How LCD Monitors Work
Liquid-crystal display
It is an electronically modulated optical device made up of any number of segments filled with liquid crystals and arrayed in front of a light source ( backlight ) or reflector to produce images in color or monochrome .
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Q853
How LCD Monitors Work
Liquid-crystal display
Liquid crystals were first discovered in 1888.
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Q853
How LCD Monitors Work
Liquid-crystal display
By 2008, worldwide sales of televisions with LCD screens exceeded annual sales of CRT units; the CRT became obsolete for most purposes.
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Q854
how many rooms in borgata hotel
The Borgata
The Borgata Hotel Casino and Spa is a luxury hotel , casino , and spa in Atlantic City, New Jersey , United States .
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Q854
how many rooms in borgata hotel
The Borgata
It is owned by Marina District Development , a joint venture between Boyd Gaming and a divesture trust established by MGM Resorts International .
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Q854
how many rooms in borgata hotel
The Borgata
The $1.1 billion casino hotel features 2,002 rooms and is the largest hotel in New Jersey .
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Q854
how many rooms in borgata hotel
The Borgata
The Borgata opened in July 2003 as a Las Vegas-style megaresort and is the top-grossing casino in Atlantic City.
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Q856
how many classes of vitamins
Vitamin
A bottle of high potency B-complex vitamin supplement pills.
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Q856
how many classes of vitamins
Vitamin
A vitamin ( or ) is an organic compound required by an organism as a vital nutrient in limited amounts.
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Q856
how many classes of vitamins
Vitamin
An organic chemical compound (or related set of compounds) is called a vitamin when it cannot be synthesized in sufficient quantities by an organism, and must be obtained from the diet.
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Q856
how many classes of vitamins
Vitamin
Thus, the term is conditional both on the circumstances and on the particular organism.
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Q856
how many classes of vitamins
Vitamin
For example, ascorbic acid ( vitamin C ) is a vitamin for humans, but not for most other animals, and biotin and vitamin D are required in the human diet only in certain circumstances.
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Q856
how many classes of vitamins
Vitamin
By convention, the term vitamin includes neither other essential nutrients , such as dietary minerals , essential fatty acids , or essential amino acids (which are needed in larger amounts than vitamins) nor the large number of other nutrients that promote health but are otherwise required less often.
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Q856
how many classes of vitamins
Vitamin
Thirteen vitamins are universally recognized at present.
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Q856
how many classes of vitamins
Vitamin
Vitamins are classified by their biological and chemical activity, not their structure.
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Q856
how many classes of vitamins
Vitamin
Thus, each "vitamin" refers to a number of vitamer compounds that all show the biological activity associated with a particular vitamin.
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Q856
how many classes of vitamins
Vitamin
Such a set of chemicals is grouped under an alphabetized vitamin "generic descriptor" title, such as " vitamin A ", which includes the compounds retinal , retinol , and four known carotenoids .
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Q856
how many classes of vitamins
Vitamin
Vitamers by definition are convertible to the active form of the vitamin in the body, and are sometimes inter-convertible to one another, as well.
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Q856
how many classes of vitamins
Vitamin
Vitamins have diverse biochemical functions.
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Q856
how many classes of vitamins
Vitamin
Some have hormone-like functions as regulators of mineral metabolism (such as vitamin D), or regulators of cell and tissue growth and differentiation (such as some forms of vitamin A ).
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Q856
how many classes of vitamins
Vitamin
Others function as antioxidants (e.g., vitamin E and sometimes vitamin C ).
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Q856
how many classes of vitamins
Vitamin
The largest number of vitamins (such as B complex vitamins) function as precursors for enzyme cofactors , that help enzymes in their work as catalysts in metabolism .
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Q856
how many classes of vitamins
Vitamin
In this role, vitamins may be tightly bound to enzymes as part of prosthetic groups : For example, biotin is part of enzymes involved in making fatty acids .
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Q856
how many classes of vitamins
Vitamin
Vitamins may also be less tightly bound to enzyme catalysts as coenzymes , detachable molecules that function to carry chemical groups or electrons between molecules.
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Q856
how many classes of vitamins
Vitamin
For example, folic acid may carry methyl , formyl , and methylene groups in the cell.
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Q856
how many classes of vitamins
Vitamin
Although these roles in assisting enzyme-substrate reactions are vitamins' best-known function, the other vitamin functions are equally important.
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Q856
how many classes of vitamins
Vitamin
Until the mid-1930s, when the first commercial yeast-extract vitamin B complex and semi-synthetic vitamin C supplement tablets were sold, vitamins were obtained solely through food intake, and changes in diet (which, for example, could occur during a particular growing season) usually greatly altered the types and amounts of vitamins ingested.
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Q856
how many classes of vitamins
Vitamin
However, vitamins have been produced as commodity chemicals and made widely available as inexpensive semisynthetic and synthetic-source multivitamin dietary and food supplements and additives, since the middle of the 20th century.
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Q859
what country has the most muslims in the world
Islam by country
World Muslim population by percentage ( Pew Research Center , 2009)
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Q859
what country has the most muslims in the world
Islam by country
World Muslim population in millions
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Q859
what country has the most muslims in the world
Islam by country
Islam is the world's second largest religion after Christianity .
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Q859
what country has the most muslims in the world
Islam by country
According to a 2010 study, Islam has 1.62 billion adherents, making up over 23% of the world population.
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Q859
what country has the most muslims in the world
Islam by country
Islam is the predominant religion in the Middle East , in Sahel , in the Horn of Africa and northern Africa , and in some parts of Asia.
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Q859
what country has the most muslims in the world
Islam by country
Large communities of Muslims are also found in China , the Balkans , and Russia .
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Q859
what country has the most muslims in the world
Islam by country
Other parts of the world host large Muslim immigrant communities; in Western Europe , for instance, Islam is the second largest religion after Christianity, where it represents 6% of the total population.
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Q859
what country has the most muslims in the world
Islam by country
According to the Pew Research Center in 2010 there were 49 Muslim-majority countries.
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Q859
what country has the most muslims in the world
Islam by country
Around 62% of the world's Muslims live in South and Southeast Asia, with over 1 billion adherents.
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Q859
what country has the most muslims in the world
Islam by country
The largest Muslim country is Indonesia , home to 12.7% of the world's Muslims, followed by Pakistan (11.0%), India (10.9%), and Bangladesh (9.2%).
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Q859
what country has the most muslims in the world
Islam by country
About 20% of Muslims live in Arab countries .
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Q859
what country has the most muslims in the world
Islam by country
In the Middle East, the non-Arab countries of Turkey and Iran are the largest Muslim-majority countries; in Africa, Egypt and Nigeria have the most populous Muslim communities.
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Q859
what country has the most muslims in the world
Islam by country
A study conducted by the Pew Research Center in 2010 and released January 2011 found that there are 1.62 billion Muslims around the world.
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Q859
what country has the most muslims in the world
Islam by country
The study found more Muslims in the United Kingdom than in Lebanon and more in China than in Syria .
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Q860
how do people use the land of rhode island
Rhode Island
Rhode Island ( or ), officially the State of Rhode Island and Providence Plantations, is a state in the New England region of the United States .
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Q860
how do people use the land of rhode island
Rhode Island
Rhode Island is the smallest in area , the eighth least populous , but the second most densely populated of the 50 US states behind New Jersey .
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Q860
how do people use the land of rhode island
Rhode Island
Rhode Island is bordered by Connecticut to the west and Massachusetts to the north and east, and it shares a water boundary with New York's Long Island to the southwest.
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Q860
how do people use the land of rhode island
Rhode Island
Rhode Island was the first of the 13 original colonies to declare independence from British rule, declaring itself independent on May 4, 1776, two months before any other colony.
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Q860
how do people use the land of rhode island
Rhode Island
The State was also the last of the thirteen original colonies to ratify the United States Constitution .
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Q860
how do people use the land of rhode island
Rhode Island
Rhode Island's official nickname is "The Ocean State", a reference to the State's geography, since Rhode Island has several large bays and inlets that amount to about 14% of its total area.
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Q860
how do people use the land of rhode island
Rhode Island
Its land area is , but its total area is significantly larger.
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Q861
what country is dubai in
Dubai
Dubai ( ; ', ) is a city in the United Arab Emirates , located within the emirate of the same name.
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Q861
what country is dubai in
Dubai
The emirate of Dubai is located on the southeast coast of the Persian Gulf on the Arabian Peninsula and is one of the seven emirates that make up the country.
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Q861
what country is dubai in
Dubai
It has the largest population in the UAE (2,106,177) and the second-largest land territory by area (4,114 km2) after Abu Dhabi .
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Q861
what country is dubai in
Dubai
Dubai and Abu Dhabi, the national capital, are the only two emirates to have veto power over critical matters of national importance in the country's legislature .
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Q861
what country is dubai in
Dubai
The city of Dubai is located on the emirate's northern coastline and heads up the Dubai-Sharjah-Ajman metropolitan area .
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Q861
what country is dubai in
Dubai
Dubai is nowadays often misperceived as a country or city-state and, in some cases, the UAE as a whole has been described as 'Dubai'.
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Q861
what country is dubai in
Dubai
The earliest mention of Dubai is in 1095 AD, and the earliest recorded settlement in the region dates from 1799.
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Q861
what country is dubai in
Dubai
The Sheikhdom of Dubai was formally established in 1833 by Sheikh Maktoum bin Butti Al-Maktoum when he persuaded around 800 members of his tribe of the Bani Yas , living in what was then the Second Saudi State and now part of Saudi Arabia , to follow him to the Dubai Creek by the Abu Falasa clan of the Bani Yas.
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Q861
what country is dubai in
Dubai
It remained under the tribe's control when the United Kingdom assumed protection of the Sheikhdom in 1892 and joined the nascent United Arab Emirates upon independence in 1971 as the country's second emirate.
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Q861
what country is dubai in
Dubai
Its strategic geographic location made the town an important trading hub and by the beginning of the 20th century, Dubai was already an important regional port.
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Q861
what country is dubai in
Dubai
Today, Dubai has emerged as a cosmopolitan metropolis that has grown steadily to become a global city and a business and cultural hub of the Middle East and the Persian Gulf region.
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Q861
what country is dubai in
Dubai
Although Dubai's economy was historically built on the oil industry , the emirate's Western-style model of business drives its economy with the main revenues now coming from tourism , real estate, and financial services.
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Q861
what country is dubai in
Dubai
Dubai has recently attracted world attention through many innovative large construction projects and sports events.
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Q861
what country is dubai in
Dubai
The city has become symbolic for its skyscrapers and high-rise buildings , such as the world's tallest Burj Khalifa , in addition to ambitious development projects including man-made islands , hotels , and some of the largest shopping malls in the region and the world.
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Q861
what country is dubai in
Dubai
This increased attention has also highlighted labor and human rights issues concerning the city's largely South Asian paid workforce.
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Q861
what country is dubai in
Dubai
Dubai's property market experienced a major deterioration in 2008–2009 as a result of the worldwide economic downturn following the financial crisis of 2007-2008 .
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Q861
what country is dubai in
Dubai
However, Dubai has made a steady and gradual recovery with help coming from neighboring emirates.
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Q861
what country is dubai in
Dubai
The handful of new projects that are in the pipeline have been able to help Dubai real estate make a comeback.
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Q861
what country is dubai in
Dubai
As of 2012, Dubai is the 22nd most expensive city in the world, and the most expensive city in the Middle East, surpassing Israel 's Tel Aviv (31st).
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Q861
what country is dubai in
Dubai
Dubai has also been rated as one of the best places to live in the Middle East, including by US American global consulting firm Mercer who rated the city as the best place to live in the Middle East in 2011.
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Q862
how many colleges are in illinois
List of colleges and universities in Illinois
The following is a list of colleges and universities in the U.S. state of Illinois .
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Q863
how much of earth is covered ocean water
Ocean
Surface of the Atlantic ocean meeting the Earth's planetary boundary layer and troposphere .
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Q863
how much of earth is covered ocean water
Ocean
Waves on an ocean coast .
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Q863
how much of earth is covered ocean water
Ocean
This animation uses Earth science data from a variety of sensors on NASA Earth observing satellites to measure physical oceanography parameters such as ocean currents, ocean winds, sea surface height and sea surface temperature.
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Q863
how much of earth is covered ocean water
Ocean
An ocean (; the World Ocean of classical antiquity ) is a body of saline water that composes a large part of a planet 's hydrosphere .
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Q863
how much of earth is covered ocean water
Ocean
In the context of Earth , it refers to one or all of the major divisions of the planet's World Ocean – they are, in descending order of area, the Pacific , Atlantic , Indian , Southern (Antarctic) , and Arctic Oceans.
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Q863
how much of earth is covered ocean water
Ocean
The word " sea " is often used interchangeably with "ocean", but strictly speaking a sea is a body of saline water (possibly a division of the World Ocean) partly or fully enclosed by land.
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Q863
how much of earth is covered ocean water
Ocean
Earth is the only planet known to have an ocean (or any large amounts of open liquid water).
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Q863
how much of earth is covered ocean water
Ocean
Approximately 72% of the planet's surface (~3.6x108 km2) is covered by saline water that is customarily divided into several principal oceans and smaller seas, with the ocean covering approximately 71% of the Earth's surface.
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Q863
how much of earth is covered ocean water
Ocean
In terms of the hydrosphere of the Earth, the ocean contains 97% of the Earth's water.
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Q863
how much of earth is covered ocean water
Ocean
Oceanographers have stated that out of 97%, only 5% of the ocean as a whole on Earth has been explored.
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Q863
how much of earth is covered ocean water
Ocean
Because it is the principal component of Earth's hydrosphere, the world ocean is integral to all known life , forms part of the carbon cycle , and influences climate and weather patterns.
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Q863
how much of earth is covered ocean water
Ocean
The total volume is approximately 1.3 billion cubic kilometres (310 million cu mi) with an average depth of .
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Q863
how much of earth is covered ocean water
Ocean
It is the habitat of 230,000 known species , although much of the ocean's depths remain unexplored and it is estimated that over two million marine species exist.
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Q863
how much of earth is covered ocean water
Ocean
The origin of Earth's oceans is still unknown, but oceans are believed to have formed in the Hadean period and may have been the impetus for the emergence of life .
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Q863
how much of earth is covered ocean water
Ocean
Extraterrestrial oceans may be composed of a wide range of elements and compounds .
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Q863
how much of earth is covered ocean water
Ocean
The only confirmed large stable bodies of extraterrestrial surface liquids are the lakes of Titan , although there is evidence for the existence of oceans elsewhere in the Solar System .
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Q863
how much of earth is covered ocean water
Ocean
Early in their geologic histories, Mars and Venus are theorized to have had large water oceans.
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Q863
how much of earth is covered ocean water
Ocean
The Mars ocean hypothesis suggests that nearly a third of the surface of Mars was once covered by water, though the water on Mars is no longer oceanic, and a runaway greenhouse effect may have boiled away the global ocean of Venus.
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Q863
how much of earth is covered ocean water
Ocean
Compounds such as salts and ammonia dissolved in water lower its freezing point, so that water might exist in large quantities in extraterrestrial environments as brine or convecting ice .
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Q863
how much of earth is covered ocean water
Ocean
Unconfirmed oceans are speculated beneath the surface of many dwarf planets and natural satellites; notably, the ocean of Europa is believed to have over twice the water volume of Earth.
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Q863
how much of earth is covered ocean water
Ocean
The Solar System's gas giant planets are also believed to possess liquid atmospheric layers of yet to be confirmed compositions.
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Q863
how much of earth is covered ocean water
Ocean
Oceans may also exist on exoplanets and exomoons , including surface oceans of liquid water within a circumstellar habitable zone .
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Q863
how much of earth is covered ocean water
Ocean
Ocean planets are a hypothetical type of planet with a surface completely covered with liquid.
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Q866
how did elvis presley contribute to the popularity of rock and roll?
Elvis Presley
Elvis Aaron Presley (January 8, 1935 – August 16, 1977) was an American singer and actor.
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Q866
how did elvis presley contribute to the popularity of rock and roll?
Elvis Presley
A cultural icon , he is commonly known by the single name Elvis.
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Q866
how did elvis presley contribute to the popularity of rock and roll?
Elvis Presley
One of the most popular musicians of the 20th century, he is often referred to as the "King of Rock and Roll" or "the King".
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