Two of the most well-known applications of the pure elements are rubidium and caesium atomic clocks, of which caesium atomic clocks are the most accurate representation of time known as of.

Two cellular phone providers cover most of the country.

Two million years ago, the only sign of fire is burnt earth with human remains, which most other anthropologists consider to be mere coincidence rather than evidence of intentional fire.

Two thirds of the chemical elements occur on Earth only as compounds, and in the remaining third, often the compound forms of the element are most common.

Two of the most popular are Penny Arcade, focused primarily on video gaming, and User Friendly, which bases its humor on the Internet and other computer-user issues.

Two of Confucius's most famous later followers emphasized radically different aspects of his teachings.

Two volcanoes form the island's most prominent topographic features: La Grille in the north, with an elevation of 1, 000 meters, is extinct and largely eroded ; Kartala in the south, rising to a height of 2, 361 meters, last erupted in 1977.

Two of the most notable differences are that the balls are always played in the same sequence ( blue, red, black, yellow ) throughout the game, and that a ball's " deadness " on other balls is carried over from turn to turn until the ball has been " cleared " by scoring its next hoop.

Two 2008 case studies show that the layout of a system provides a strong correlation to the ease of use for a system and that it proved more beneficial for the design to focus on presenting information in a way that reflected the most important goals and tasks of the user, rather than the structure of the organization.

Two of the most popular of the period were of Pomona ( goddess of orchards ) as a metaphor for Agriculture, and Diana, representing Commerce, which is a perpetual hunt for advantage and profits.

His most celebrated books include the bestselling Green Eggs and Ham, The Cat in the Hat, One Fish Two Fish Red Fish Blue Fish, Horton Hatches the Egg, Horton Hears a Who !, and How the Grinch Stole Christmas !.

Two of the most popular are " OIL RIG " ( Oxidation Is Loss, Reduction Is Gain ) and " LEO " the lion says " GER " ( Lose Electrons: Oxidization, Gain Electrons: Reduction ).

Two instruments, the Berlin questionnaire are the most validated.

Two of the most useful points for diving are the coast off Playa del Matorral in the South, and the zone between Lobos Island and Corralejo in the north.

Two of the most outspoken critics of the guild system were Jean-Jacques Rousseau and Adam Smith, and all over Europe a tendency to oppose government control over trades in favour of laissez-faire free market systems was growing rapidly and making its way into the political and legal system.

Two Pacific Ocean populations are known to exist: one of not more than 130 individuals ( according to the most recent population assessment in 2008 ) whose migratory route is presumed to be between the Sea of Okhotsk and southern Korea, and a larger one with a population between 20, 000 and 22, 000 individuals in the eastern Pacific travelling between the waters off Alaska and Baja California Sur.

Two bodies oversee the administration of the college, the Board of Corporators and the Board of Trustees ; while the Corporators are the official legal owners of the college, in practice most authority is delegated to the Trustees, who are elected by the Corporators.

Two years later, AFI released the list AFI's 100 Years ... 100 Passions honoring the most romantic films for the past 100 years, Harold and Maude ranked # 69.

Two of the most notable Mediterranean civilizations in classical antiquity were the Greek city states and the Phoenicians.

Two deacons go to priest-elect who, at that point, had been standing alone in the middle of the church, and bow him down to the west ( to the people ) and to the east ( to the clergy ), asking their consent by saying “ Command ye !” and then lead him through the holy doors of the altar where the archdeacon asks the bishop ’ s consent, saying, “ Command, most sacred master !” after which a priest escorts the candidate three times around the Holy Table, during which he kisses each corner of the Holy Table as well as the bishop's epigonation and right hand and prostrates himself before the holy table at each circuit.

The most common size has 34 strings: Two octaves below middle C and two and a half above ( ending on A ), although folk or lever harps can usually be found with anywhere from 19 to 40 strings.

Two of the most prominent composers of the Classical period ( music ), Joseph Haydn ( 1732 – 1809 ) and Wolfgang Amadeus Mozart ( 1756 – 1791 ), wrote harpsichord music.

Two of the most dramatic changes were in Iraq's relationships with the Soviet Union and with the United States.

Two trees, one common and one rare, are highlighted to increase public awareness of indigenous trees, while various " greening " activities are undertaken by schools, businesses and other organizations.

Two whole numbers m and n are called coprime if their greatest common divisor is 1 ; i. e., if there is no prime number that divides both of them.

Two common bookkeeping systems used by businesses and other organizations are the single-entry bookkeeping system and the double-entry bookkeeping system.

Two versions of Blackwood are common: " standard " Blackwood, developed by Easley, and " Roman key card " or " RKC " Blackwood, named for the Italian team which invented it.

Two common types of employee crime exist: embezzlement and sabotage.

Two electric multiple unit s of the DBAG Class 423 | class 423 common in several German S-Bahn networks.

* Two clades are sisters if they have an immediate common ancestor.

Two common sources of DMT in the western US are Reed canary grass ( Phalaris arundinacea ) and Harding grass ( Phalaris aquatica ).

Two decades earlier the Royal and Parliamentary Titles Act 1927 had stated that the United Kingdom and the dominions were " equal in status, in no way subordinate one to another in any aspect of their domestic or external affairs, though united by common allegiance to the Crown, and freely associated as members of the British Commonwealth of Nations ".

Two regions are called adjacent if they share a common boundary that is not a corner, where corners are the points shared by three or more regions.

# On 15 September 1790, to his double first cousin Maria Teresa of the Two Sicilies ( 6 June 1772 – 13 April 1807 ), daughter of King Ferdinand I of the Two Sicilies ( both were grandchildren of Empress Maria Theresa and shared all of their other grandparents in common ), with whom he had twelve children, of whom only seven reached adulthood.

Two common examples are shareware and trialware.

Two common types of engineered design for anchoring floating structures include tension-leg and catenary loose mooring systems.

Two numbers are called relatively prime, or coprime if their greatest common divisor equals 1.

Two styles of hearse bodywork are common.

Two important aspects of a concise language are as follows: First, the most common words ( e. g., " a ", " the ", " I ") should be shorter than less common words ( e. g., " roundabout ", " generation ", " mediocre ",) so that sentences will not be too long.

Two most common forms of engine cooling are air-cooled and water cooled — most modern engines are water cooled.

Two million years ago, scientists believe, the jaguar and its closest relative, the similarly spotted leopard, shared a common ancestor in Asia.

Metals typically consist of close-packed atoms, meaning that the atoms are arranged like sphere Two packing motifs are common, one being body-centered cubic wherein each metal is surrounded by eight equivalent metals.

Two common examples used are: