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Pendulum whose period is precisely two seconds
A seconds pendulum is a pendulum whose period is precisely two seconds; one second for a swing in one direction and one second for the return swing, a
Seconds_pendulum
Mechanism for regulating the speed of clocks
A pendulum is a device made of a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced sideways from its resting, equilibrium
Pendulum
Clock regulated by a pendulum
A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. The advantage of a pendulum for timekeeping is that it
Pendulum_clock
phenomena. As a base unit of length, scientists had favoured the seconds pendulum (a pendulum with a half-period of one second) one century earlier, but this
History_of_the_metre
Reversible free swinging pendulum
the seconds pendulum, a pendulum with a period of two seconds, so each swing takes one second. It can be seen from equation (1) that for a seconds pendulum
Kater's_pendulum
Device to demonstrate Earth's rotation
The Foucault pendulum or Foucault's pendulum is a simple device named after French physicist Léon Foucault, conceived as an experiment to demonstrate
Foucault_pendulum
Pendulum mechanism that adjusts with temperature
A gridiron pendulum was a temperature-compensated clock pendulum invented by British clockmaker John Harrison around 1726. It was used in precision clocks
Gridiron_pendulum
Brand-name torsion pendulum clock
torsion pendulum, which consumes less energy than an ordinary pendulum. The torsion pendulum has a period of precisely one minute; thirty seconds to rotate
Atmos_clock
SI unit of time
precisely 31,557,600 seconds. Some common events in seconds are: a stone falls about 4.9 meters from rest in one second; a pendulum of length about one
Second
1790 report to the US Congress
selected the seconds pendulum at 45° latitude as the basic reference. For technical reasons, he proposed using a uniform rod as the pendulum rather than
Plan for Establishing Uniformity in the Coinage, Weights, and Measures of the United States
Plan_for_Establishing_Uniformity_in_the_Coinage,_Weights,_and_Measures_of_the_United_States
Scalar measure of the rotational inertia with respect to a fixed axis of rotation
the seconds pendulum must be adjusted to accommodate different values for the local acceleration of gravity. Kater's pendulum is a compound pendulum that
Moment_of_inertia
Geodetic survey from 1792 to 1798
a "seconds pendulum" (a pendulum with a half-period of one second). In 1656, Christiaan Huygens, inspired by Galileo, invented the first pendulum clock
Arc measurement of Delambre and Méchain
Arc_measurement_of_Delambre_and_Méchain
Tall, freestanding, weight-driven pendulum clock
were more accurate. Almost all longcase clocks use a seconds pendulum (also called a "Royal" pendulum) meaning each swing (or half-period) takes one second
Grandfather_clock
English astronomer (1774–1844)
Astr. Soc. vii.). This value was corrected for the length of the seconds-pendulum by introducing a neglected element of reduction, and was used, in 1843
Francis_Baily
Speed of sound wave through elastic medium
Marin Mersenne in 1630 found two values. When measuring the time (of a seconds pendulum) between seeing the flash of a gun and hearing its sound over a known
Speed_of_sound
crisis – 1970s–80s watchmaking industry upheaval Seconds pendulum – Pendulum whose period is precisely two seconds Smart Metrology – Approach to industrial metrology
History of timekeeping devices
History_of_timekeeping_devices
SI unit of length
phenomena. As a base unit of length, scientists had favoured the seconds pendulum (a pendulum with a half-period of one second) one century earlier, but this
Metre
French polymath (1588–1648)
pendulums, reported in his Cogitata Physico-Mathematica in 1644. He was the first to measure the length of the seconds pendulum, that is a pendulum whose
Marin_Mersenne
Italian physicist and astronomer (1564–1642)
the Biblioteca Magliabechiana in 1861. Catholic Church and science Seconds pendulum Tribune of Galileo Villa Il Gioiello /ˌɡælɪˈleɪoʊ ˌɡælɪˈleɪ/ GAL-il-AY-oh
Galileo_Galilei
Precision electromechanical pendulum clock
primary pendulum, this mechanism ensuring that the primary pendulum received an identical mechanical impulse every 30 seconds from the primary pendulum gravity
Shortt–Synchronome_clock
Free swinging suspended body
A pendulum is a body suspended from a fixed support that freely swings back and forth under the influence of gravity. When a pendulum is displaced sideways
Pendulum_(mechanics)
Standard gravitational acceleration on Earth
considering the uncertainty in the result. Gravity of Earth Gravity map Seconds pendulum Theoretical gravity Though this sometimes means the normal gravity
Standard_gravity
Meridian line in Paris, France
seconds, lost about two minutes and a half daily at Cayenne, and that to bring it to measure mean solar time it was necessary to shorten the pendulum
Paris_meridian
Measure of time intervals using the metric system
Academy of Sciences to develop the system. The commission rejected the seconds-pendulum definition of the metre the following year because the second of time
Metric_time
18th-century expedition to present-day Ecuador
Quito in June 1736. Pierre Bouguer established the length of a pendulum beating seconds on the Equator at Quito, near Quito at the top of Pinchincha, and
French Geodesic Mission to the Equator
French_Geodesic_Mission_to_the_Equator
Clock that uses a torsion pendulum to keep time
Kundo reverts here. For other use, see Kundo (disambiguation) A torsion pendulum clock, more commonly known as an anniversary clock or 400-day clock, is
Torsion_pendulum_clock
Dutch mathematician and physicist (1629–1695)
engine List of largest optical telescopes historically Fokker Organ Seconds pendulum /ˈhaɪɡənz/ HY-gənz, US also /ˈhɔɪɡənz/ HOY-gənz; Dutch: [ˈkrɪstijaːn
Christiaan_Huygens
Type of physics demonstration
A pendulum wave is an elementary physics demonstration and kinetic art comprising a number of uncoupled simple pendulums with monotonically increasing
Pendulum_wave
French physicist and astronomer (1786–1853)
coasts of France, England and Scotland. They measured the length of the seconds pendulum at Leith, Scotland, and in the Shetland Islands, the results of the
François_Arago
French mathematician (1752–1833)
Saccheri–Legendre theorem Least squares Least-squares spectral analysis Seconds pendulum From Summetria to Symmetry: The Making of a Revolutionary Scientific
Adrien-Marie_Legendre
Quantity standard
word List of metric units Numerical-value equation Scottish units Seconds pendulum Space (punctuation)#Unit symbols and numbers System of measurement
Unit_of_measurement
Instrument for measuring, keeping or indicating time
a clock that lost or gained less than about 10 seconds per day. This clock could not contain a pendulum, which would be virtually useless on a rocking
Clock
Large prominently located clock used as a public amenity
the pendulum, and allowed longer pendulums to be used. While domestic pendulum clocks usually use a seconds pendulum 1.0 meter (39 in) long, tower clocks
Turret_clock
Precision clock that synchronizes other clocks in a network
electrical signals. The master clock was usually a precision pendulum clock with a seconds pendulum and a robust mechanism. It generated periodic timing signals
Master_clock
Size and shape used to model the Earth for geodesy
Helmert History of geodesy History of the metre Meridian arc#History Seconds pendulum Timeline of Earth estimates Cloud, John (2000). "Crossing the Olentangy
Figure_of_the_Earth
Intergovernmental organisation
Standardization Institute for Reference Materials and Measurements Metrologia Seconds pendulum World Metrology Day Versailles project on advanced materials and standards
International Bureau of Weights and Measures
International_Bureau_of_Weights_and_Measures
French astronomer
astronomical unit). While there he also measured the length of a seconds pendulum, that is a pendulum with a half-swing of one second, and found it to be 1.25
Jean_Richer
American inventor and painter (1791–1872)
Improvement in electric telegraphs, May 1, 1849 Daniel Davis Jr. Seconds pendulum Telegraph in United States history "It was in the month of J, a century
Samuel_Morse
Distance along a portion of a meridian, for use in geodesy
appointed a commission chaired by Jean-Charles de Borda. Instead of the seconds pendulum method, the commission of the French Academy of Sciences – whose members
Meridian_arc
Italian-French scientist (1736–1813)
Gauss's law History of the metre Lagrange's role in measurement reform Seconds pendulum UK: /læˈɡrɒ̃ʒ/, US: /ləˈɡreɪndʒ, ləˈɡrɑːndʒ, ləˈɡrɒ̃ʒ/; French: [ʒozɛf
Joseph-Louis_Lagrange
Unit of length
parliament proposed defining the standard yard based upon the length of a seconds pendulum. This idea was examined but not approved. The Weights and Measures
Yard
Italian inventor, architect and engineer (1617–1681)
universal] metre'), a unit of length equivalent to the length of a free seconds pendulum; it differs from the modern metre by half a centimetre. He is considered
Tito_Livio_Burattini
Type of mechanism used in pendulum clocks
escapement used in pendulum clocks. The escapement is a mechanism in a mechanical clock that maintains the swing of the pendulum by giving it a small
Anchor_escapement
French philosopher and mathematician (1743–1794)
Knight Flashback (2021 film) [citation needed] History of the metre Seconds pendulum Society of the Friends of Truth Moulin, H.; Peyton Young, H. (2018)
Marquis_de_Condorcet
German astronomer and mathematician (1784–1846)
des einfachen Secundenpendels. [Investigations on the length of the seconds pendulum], Berlin, 1828 Versuche über die Kraft mit welcher die Erde Körper
Friedrich_Wilhelm_Bessel
English polymath (1773–1829)
ascertaining the precise length of the seconds pendulum (the length of a pendulum whose period is exactly two seconds), and in 1818 he became secretary to
Thomas_Young_(scientist)
French learned society
salons and academies French Geodesic Mission History of the metre Seconds pendulum Royal Commission on Animal Magnetism "More about the Academie des Sciences
French_Academy_of_Sciences
French polymath (1749–1827)
(1825) History of the metre Laplace–Bayes estimator Ratio estimator Seconds pendulum List of things named after Pierre-Simon Laplace Pascal's wager S.W
Pierre-Simon_Laplace
Mechanism for regulating the speed of clocks
action transfers energy to the clock's timekeeping element (usually a pendulum or balance wheel) to replace the energy lost to friction during its cycle
Escapement
Advanced astronomical clock
surplus that is "dumped" by the air-brake with each tick. The pendulum is a "seconds pendulum" and therefore requires a theoretical length of 994.5 mm for
Jens_Olsen's_World_Clock
Former U.S. government scientific agency
flags Radio acoustic ranging Nautical chart Naval Oceanographic Office Seconds pendulum Surveying Topography United States Hydrographic Office US Coast and
United States Coast and Geodetic Survey
United_States_Coast_and_Geodetic_Survey
French mathematician and astronomer (1744–1804)
the metre Messier object List of Messier objects Messier marathon Seconds pendulum Meridian arc of Delambre and Méchain "Library and Archive". Royal Society
Pierre_Méchain
French mathematician (1746–1818)
equation Monge's theorem Clebsch representation Earth mover's distance Seconds pendulum Transportation theory Sooyoung Chang, Academic Genealogy of Mathematicians
Gaspard_Monge
United States legislation of 1866 concerning usage of the metric system
grams) were dropped as unnecessary units. They are now expressed in kilometers and kilograms (units of 1,000). Seconds pendulum "Metric Act of 1866".
Metric_Act_of_1866
French astronomer and priest (1620–1682)
Michallet. 1684. List of Roman Catholic scientist-clerics Meridian arc Seconds pendulum Débarbat, Suzanne; Wilson, Curtis (2003). "The Galilean satellites
Jean_Picard
French mathematician and astronomer (1749–1822)
analogies History of the metre Arc measurement of Delambre and Méchain Seconds pendulum Ten, Antonio E. (2014). "Delambre, Jean-Baptiste-Joseph". Biographical
Jean_Baptiste_Joseph_Delambre
the time in seconds for the amplitude of swing to decrease from either 6 to 3 degrees (Konig pendulum) or 12 to 4 degrees (Persoz pendulum). PRA. Mechanical
Persoz_pendulum
Mathematician and astronomer (1625–1712)
numbers Cassini's laws History of the metre Neith (hypothetical moon) Seconds pendulum His name may also be spelled Giovan Domenico Cassini or Gian Domenico
Giovanni_Domenico_Cassini
1875 international standardization treaty
Outline of metrology and measurement Metrication History of the metre Seconds pendulum World Metrology Day As of 2012, the only "economy" that was an associate
Metre_Convention
Inertial navigation design principle
the classic formula for the period of a pendulum: T = 2 π L g ≈ 2 π 6 371 000 m 9.81 m / s 2 ≈ 5063 seconds ≈ 84.4 minutes , {\displaystyle T=2\pi
Schuler_tuning
Italian astronomer and priest (1598–1671)
were pendulums with periods within 1.85%, and then 0.69%, of the desired value; and Riccioli even sought to improve on the latter value. The seconds pendulum
Giovanni_Battista_Riccioli
French physicist (1774–1862)
l'astronomie égyptienne (Didot, 1823) Abampere History of the metre Seconds pendulum O'Connor, John J.; Robertson, Edmund F., "Jean-Baptiste Biot", MacTutor
Jean-Baptiste_Biot
Constituent scientific organization
Measures International Geodetic Student Organisation Metre Convention Seconds pendulum In the second half of the 19th century, the creation of the International
International Association of Geodesy
International_Association_of_Geodesy
staves on paper, a metronome-like chronomètre based on the Galilean seconds pendulum and a sonomètre for tuning harpsichords that used the monochord as
Étienne_Loulié
Early clock mechanism
water clocks, to repetitive, oscillatory processes, such as the swing of pendulums, which had the potential to be more accurate. Oscillating timekeepers
Verge_escapement
American reality TV series
Destroyed in Seconds is an American television series that premiered on Discovery Channel on August 21, 2008. Hosted by Ron Pitts, it features video segments
Destroyed_in_Seconds
Coupled mechanical oscillator
A Wilberforce pendulum, invented by British physicist Lionel Robert Wilberforce around 1896, consists of a mass suspended by a long helical spring and
Wilberforce_pendulum
mathematical seconds pendulum at any place on the Earth, compares it with that of Laplace and corrects de Prony's formula for the length of physical seconds pendulum
Ivan_Paskvić
Irish astronomer, geophysicist, ornithologist and explorer
particular the determination of the length of the seconds pendulum. By measuring the length of a seconds pendulum in different latitudes, one can calculate the
Edward_Sabine
Rotation of Earth around its axis
Panthéon in Paris. Because of Earth's rotation under the swinging pendulum, the pendulum's plane of oscillation appears to rotate at a rate depending on latitude
Earth's_rotation
Clock tower in London, England
penny will change the clock's speed by 0.4 seconds per day. Other coins have been placed on the pendulum as well; in 2009, three of the pennies were
Big_Ben
Kinetic sculpture in Hornsby, Sydney, Australia
sculpture. Seconds are marked by the rotation of the glass wheel which has 30 pins around the edge. Each half-cycle of the pendulum (2 seconds) results
Hornsby_Water_Clock
Music timing device
of beats per second caused by different dissonances, they used the "seconds pendulum" invented by Galileo earlier in the century. It doubtlessly[citation
Chronomètre_of_Loulié
Prussian geodesist and general (1794–1885)
chemist Adolf von Baeyer. Baeyer was a Lutheran. History of the metre Seconds pendulum Siegmund Günther (1902). "Baeyer, Johann Jakob" . Allgemeine Deutsche
Johann_Jacob_Baeyer
Instrument that records seismic waves by measuring ground motions
central position. The pendulum is adjusted (before the damping is installed) to oscillate once per three seconds, or once per thirty seconds. The general-purpose
Seismometer
British geodesist (1828–1914)
For details see the Bibliography. Alwyn Robbins History of the metre Seconds pendulum The Empire Survey Review changed its name to Survey Review in 1963
Alexander_Ross_Clarke
British naval officer and explorer
to Africa to commence a series of observations on the length of the seconds pendulum. At Clavering's request the Pheasant was chosen to carry Sabine while
Douglas_Clavering
Swiss-American surveyor (1770-1845)
1830 Fire Island History of the metre Metre Polyconic projection Seconds pendulum Cajori, Florian (1980). The chequered career of Ferdinand Rudolph Hassler
Ferdinand_Rudolph_Hassler
Anglo-Irish politician
Talleyrand was pursuing similar goals with a unit of length based on the seconds pendulum, as was Thomas Jefferson in the US having been charged by President
John_Riggs_Miller
Clock used on ships to aid in navigation
were pendulum clocks, but both the rolling of a ship at sea and the up to 0.2% variations in the gravity of Earth made a simple gravity-based pendulum useless
Marine_chronometer
Russian astronomer (1819–1905)
Russische Revue (in German). 8: 1–19. January 1876. History of the metre Seconds pendulum Otto Vasilevich Struve (in Russian) Отто Васильевич Струве Archived
Otto_Wilhelm_von_Struve
2005 single by Pendulum
"Slam" is a song by Australian drum and bass band Pendulum. It was released on 19 September 2005 by independent label Breakbeat Kaos as a double A-side
Slam_(Pendulum_song)
Sculptural clock in Cambridge, England
low-friction mechanism for converting pendulum motion into rotational motion while at the same time giving back to the pendulum the energy needed to maintain
Corpus_Clock
American television series (1966–1973)
Episode 156: Cocaine Volume 12: Episode 162: The Puppet Episode 168: The Pendulum For laserdisc, Volumes 1–6 are available on that format, and in Japan's
Mission: Impossible (1966 TV series)
Mission:_Impossible_(1966_TV_series)
1876 song by Henry Clay Work
His life seconds numbering, (tick, tick, tick, tick), It stopp'd short—never to go again— When the old man died. In watching its pendulum swing to and
My_Grandfather's_Clock
Networking protocol for clock synchronization
Certificate Authority. Support for NTS is available. ntpd-rs is part of the "Pendulum" project which also includes a Precision Time Protocol implementation "statime"
Network_Time_Protocol
French clockmaker, industrialist, inventor, mechanical engineer, aeronaut and writer
engineer, aeronaut, writer, and one of the most celebrated makers of conical pendulum clocks. In 1853, he established the Manufacture d'horlogerie E. Farcot
Eugène_Farcot
kept by the pendulum. The dial is a standard Gents slave clock movement which is advanced by a pulse every 30s, counted down from seconds pulses generated
David_Robertson_(engineer)
English clockmaker (1693–1776)
minutes and 3 seconds. Guinness World Records has declared Martin Burgess' Clock B the "most accurate mechanical clock with a pendulum swinging in free
John_Harrison
Dutch mathematician and physicist (1822–1878)
standard of length by use of a seconds pendulum (initially a Foucault pendulum, later he ordered a Repsold reversible pendulum which arrived shortly after
Volkert Simon Maarten van der Willigen
Volkert_Simon_Maarten_van_der_Willigen
2008 single by Pendulum
"Propane Nightmares" is a song by Australian drum and bass band Pendulum, released as the second single from their second album In Silico. It incorporates
Propane_Nightmares
Mechanical escapement for pendulum clocks
The Riefler escapement is a mechanical escapement for precision pendulum clocks invented and patented by German instrument maker Sigmund Riefler in 1889
Riefler_escapement
cradle Keel Knee Splitter Lead Sprinkler Mancuerda Parrilla Pau de Arara Pendulum (of disputed historicity) Picana Padded cell Pillory Drunkard's cloak Shrew's
List_of_torture_methods
Ancient clock of Salisbury Cathedral
re-discovered in 1928, set aside in the cathedral tower. At that time it had a pendulum, which appeared to have been installed at a later date, replacing a verge
Salisbury_Cathedral_clock
Amusement park ride
second ride features 40 seats facing outwards which rotate from a central pendulum as the ride reaches its maximum arc angle of 120 degrees. Even though the
Psyclone (Canada's Wonderland)
Psyclone_(Canada's_Wonderland)
Vehicle propelled by ejection of gases
the rocket would achieve stability by "hanging" from the engine like a pendulum in flight. However, the rocket veered off course and crashed 184 feet (56 m)
Rocket
Concept in artificial intelligence
seconds, 1.0 seconds, 1.5 seconds, while on the y-axis is the variable given. In most cases it's the position of an object. In the inverted pendulum it
Apprenticeship_learning
Clock type
Standards) discovered that a crystal oscillator could be more accurate than a pendulum clock. The electronic circuit is an oscillator, an amplifier whose output
Quartz_clock
Clock powered by electricity
traditional mechanical movement, which keeps time with an oscillating pendulum or balance wheel powered through a gear train by a mainspring, but use
Electric_clock
Swinging ship ride at Canada's Wonderland in Vaughan, Ontario, Canada
Viking's Rage was the first of three swinging pendulum rides that operated at the park. Today, there are four pendulum rides at the park, including Psyclone,
Viking's Rage (Canada's Wonderland)
Viking's_Rage_(Canada's_Wonderland)
SECONDS PENDULUM
SECONDS PENDULUM
Boy/Male
Scottish American Irish Russian
Second son.
Surname or Lastname
English
English : patronymic from Simon, with an excrescent -d.
Girl/Female
Biblical
Second.
Girl/Female
Indian
Second Khalifah
Girl/Female
Indian
Dual, Second
Girl/Female
Spanish
Born second.
Boy/Male
Japanese
Second son.
Boy/Male
Scottish
Second son.
Girl/Female
Tamil
Second
Boy/Male
Scottish
Second son.
Surname or Lastname
English
English : patronymic from Record 1.
Boy/Male
Indian
Second
Boy/Male
Scottish American
Second son.
Girl/Female
Latin
Born second.
Girl/Female
Tamil
Dual, Second
Girl/Female
Indian
Second
Girl/Female
Egyptian
Born second.
Surname or Lastname
English
English : variant (with excrescent -d) of Simmons.
Girl/Female
Muslim
Second Khalifah
Boy/Male
Scottish
Second son.
SECONDS PENDULUM
SECONDS PENDULUM
Boy/Male
Muslim
Eye-sight, Wisdom, Sight
Girl/Female
Australian, Gaelic, Greek, Irish, Latin
Pearl; Marjoram Herb
Girl/Female
Muslim
Silk like
Girl/Female
Muslim
Name of a poetess
Boy/Male
Arabic, Australian, Muslim
Clear; Plain
Surname or Lastname
English
English : habitational name from any of various minor places named Loxley, as for example one in Warwickshire, which is named with the Old English personal name Locc + lēah ‘woodland clearing’.
Boy/Male
German
Bold; Renowned; Princely
Boy/Male
Native American
Fire.
Boy/Male
Indian, Modern
Good Performance; Good Person
Girl/Female
Arabic, Muslim
Low and Soft Sound; Heartbeat
SECONDS PENDULUM
SECONDS PENDULUM
SECONDS PENDULUM
SECONDS PENDULUM
SECONDS PENDULUM
a.
The sixtieth part of a minute of time or of a minute of space, that is, the second regular subdivision of the degree; as, sound moves about 1,140 English feet in a second; five minutes and ten seconds north of this place.
a.
To follow in the next place; to succeed; to alternate.
a.
To follow or attend for the purpose of assisting; to support; to back; to act as the second of; to assist; to forward; to encourage.
a.
Having thirty-two leaves to a sheet; as, a trigesimo-secundo form, book, leaf, size, etc.
a.
In the duodecimal system of mensuration, the twelfth part of an inch or prime; a line. See Inch, and Prime, n., 8.
adv.
Secondly; in the second place.
a.
Of the rank or degree below the best highest; inferior; second-rate; as, a second-class house; a second-class passage.
n.
A right of inheritance belonging to a second son; a property or possession so inherited.
a.
Being of the same kind as another that has preceded; another, like a protype; as, a second Cato; a second Troy; a second deluge.
a.
Having the power of second-sight.
a.
Specifically, to support, as a motion or proposal, by adding one's voice to that of the mover or proposer.
n.
The interval between any tone and the tone which is represented on the degree of the staff next above it.
n.
A secdond trial, experiment, or test; a second judicial trial, as of an accused person.
n.
The second part in a concerted piece.
a.
Of the second size, rank, quality, or value; as, a second-rate ship; second-rate cloth; a second-rate champion.
n.
The second part in a concerted piece; -- often popularly applied to the alto.
n.
A unit for the measurement of small intervals of time, such that 1012 (ten trillion) of these units make one second.
adv.
In the second place.
imp. & p. p.
of Second
n.
One who seconds or supports what another attempts, affirms, moves, or proposes; as, the seconder of an enterprise or of a motion.