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- Seconds_pendulum abstract "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 frequency of 1/2 Hz.At standard gravity its length is 0.994 m (39.1 in). This length was determined (in toises) by Marin Mersenne in 1644. In 1660, the Royal Society proposed that it be the standard unit of length. In 1675 Tito Livio Burattini proposed that it be named the meter. In 1790, one year before the metre was ultimately based on a quadrant of the Earth, Talleyrand proposed that the metre be the length of the seconds pendulum at a latitude of 45°. This option, with one-fifth of this length defining the foot, was also considered by Thomas Jefferson and others for redefining the yard in the United States shortly after gaining independence from the British Crown.In 1670 the seconds pendulum was employed by William Clement in his improved version of the original pendulum clock by Christiaan Huygens, creating the longcase clock which could tick seconds.".
- Seconds_pendulum thumbnail Grandfather_clock_q.jpg?width=300.
- Seconds_pendulum wikiPageID "9058508".
- Seconds_pendulum wikiPageRevisionID "585177257".
- Seconds_pendulum hasPhotoCollection Seconds_pendulum.
- Seconds_pendulum subject Category:Clocks.
- Seconds_pendulum subject Category:Pendulums.
- Seconds_pendulum subject Category:Units_of_length.
- Seconds_pendulum subject Category:Units_of_time.
- Seconds_pendulum type Apparatus102727825.
- Seconds_pendulum type Artifact100021939.
- Seconds_pendulum type Clock103046257.
- Seconds_pendulum type Clocks.
- Seconds_pendulum type Device103183080.
- Seconds_pendulum type Equipment103294048.
- Seconds_pendulum type Instrument103574816.
- Seconds_pendulum type Instrumentality103575240.
- Seconds_pendulum type MeasuringInstrument103733925.
- Seconds_pendulum type Object100002684.
- Seconds_pendulum type Pendulum103909160.
- Seconds_pendulum type Pendulums.
- Seconds_pendulum type PhysicalEntity100001930.
- Seconds_pendulum type Timepiece104437953.
- Seconds_pendulum type Whole100003553.
- Seconds_pendulum comment "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 frequency of 1/2 Hz.At standard gravity its length is 0.994 m (39.1 in). This length was determined (in toises) by Marin Mersenne in 1644. In 1660, the Royal Society proposed that it be the standard unit of length. In 1675 Tito Livio Burattini proposed that it be named the meter.".
- Seconds_pendulum label "Péndulo de segundos".
- Seconds_pendulum label "Seconds pendulum".
- Seconds_pendulum label "Sekundenpendel".
- Seconds_pendulum sameAs Sekundenpendel.
- Seconds_pendulum sameAs Péndulo_de_segundos.
- Seconds_pendulum sameAs m.027w4sw.
- Seconds_pendulum sameAs Q354669.
- Seconds_pendulum sameAs Q354669.
- Seconds_pendulum sameAs Seconds_pendulum.
- Seconds_pendulum wasDerivedFrom Seconds_pendulum?oldid=585177257.
- Seconds_pendulum depiction Grandfather_clock_q.jpg.
- Seconds_pendulum isPrimaryTopicOf Seconds_pendulum.
