In Newtonian mechanics, momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction. If m is an object's mass and v is its velocity, then the object's momentum p is:
In physics, the twin paradox is a thought experiment in special relativity involving identical twins, one of whom makes a journey into space in a high-speed rocket and returns home to find that the twin who remained on Earth has aged more. This result appears puzzling because each twin sees the other twin as moving, and so, as a consequence of an incorrect and naive application of time dilation and the principle of relativity, each should paradoxically find the other to have aged less. However, this scenario can be resolved within the standard framework of special relativity: the travelling twin's trajectory involves two different inertial frames, one for the outbound journey and one for the inbound journey. Another way of looking at it is to realize the travelling twin is undergoing acceleration, which makes them a non-inertial observer. In both views there is no symmetry between the spacetime paths of the twins. Therefore, the twin paradox is not actually a paradox in the sense of a logical contradiction. There is still debate as to the resolution of the twin paradox.
Loïc Leferme was a French diver who was the world free diving record holder until 2 October 2005, when he was surpassed by Herbert Nitsch. Loic was also a founder of AIDA in 1990 with Roland Specker and Claude Chapuis in Nice. In 2002 he set the world free diving record without any breathing apparatus at 162 meters. His first world record was 137 meters (1999). On 30 October 2004, he extended his own world record to 171 meters in the no limits free-diving category. The premier advocate of this type of freediving which has come to be known as Chapuis Style Freediving.
Faraday's law of induction is a law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (emf). This phenomenon, known as electromagnetic induction, is the fundamental operating principle of transformers, inductors, and many types of electric motors, generators and solenoids.
A leading actor, leading actress, or leading man or lady or simply lead, plays the role of the protagonist of a film, television show or play. The word lead may also refer to the largest role in the piece, and leading actor may refer to a person who typically plays such parts or an actor with a respected body of work. Some actors are typecast as leads, but most play the lead in some performances and supporting or character roles in others.
Mattanur Sankarankutty is an Indian percussionist who plays the chenda, Thayambaka, Panchari melam, and Panchavadyam. He was born in Mattanur in Kannur district of Kerala. He was awarded the Kerala Sangeetha Nataka Akademi Award in 1996, the Padma Shri by the Government of India in 2009 and the Sangeet Natak Akademi Award in 2012.
Jim Reardon is an American animator, storyboard artist, screenwriter, and film and television director. He is best known for his work on the animated TV series The Simpsons. He has directed over 30 episodes of the series and was credited as a supervising director for seasons 9 through 15. He has been described by Ralph Bakshi as "one of the best cartoon writers in the business".
Pavel Golia was a Slovenian poet and playwright.
Mun Bhuridatta was a Thai bhikkhu from Isan region who is credited, along with his mentor, Ajahn Sao Kantasīlo, with establishing the Thai Forest Tradition or "Kammaṭṭhāna tradition" that subsequently spread throughout Thailand and to several countries abroad.
A suffragan diocese is one of the dioceses other than the metropolitan archdiocese that constitute an ecclesiastical province. It exists in some Christian denominations, in particular the Catholic Church, the Coptic Orthodox Church of Alexandria, and the Romanian Orthodox Church.
Lallan Prasad Singh ICS was Governor of Assam (1973–80), Manipur, Meghalaya (1973–80), Nagaland (1973–81), and Tripura (1973–80).
Jon Pareles is an American journalist who is the chief popular music critic in the arts section of The New York Times.
Stephen Holden is an American writer, poet, and music and film critic.
Jim Bowden is an American technical diver, known as a cave diver and as a deep diver. In 1994 he set a world record, since broken, by diving to 925 feet (282 m). He is one of only thirty-five people who have dived below a depth of 800 feet (240 m) on self-contained breathing apparatus. He has also made six sub-five hundred foot dives.
Classical mechanics is a physical theory describing the motion of objects such as projectiles, parts of machinery, spacecraft, planets, stars, and galaxies. The development of classical mechanics involved substantial change in the methods and philosophy of physics. The qualifier classical distinguishes this type of mechanics from physics developed after the revolutions in physics of the early 20th century, all of which revealed limitations in classical mechanics.
Tropicos is an online botanical database containing taxonomic information on plants, mainly from the Neotropical realm. It is maintained by the Missouri Botanical Garden and was established in 1982. The database contains images and taxonomical and bibliographical data on more than 4.2 million herbarium specimens. In addition, it contains data on over 49,000 scientific publications. The database can be queried in English, French, and Spanish. The oldest records in the database go back to 1703.
Choo Chiat Goh is a Chinese ballet dancer, choreographer, and the founder of the renowned Goh Ballet Academy, Canada, along with his wife Lin Yee.
Syrna was a town of ancient Caria. According to Greek mythology Podalirius, son of Asclepius founded the place. He named it after the Carian princess Syrna, daughter of Damaethus, whom he married her after he first healed her from a serious injury.
Nephelis was a small town of ancient Cilicia, situated, according to Ptolemy, between Antioch and Anemurium; but if, as some suppose, it be the same place as the Zephelium or Zephelion (Ζεφέλιον) mentioned in the Stadiasmus Maris Magni, it ought to be looked for between Selinus and Celenderis. Near the place was a promontory of the same name, where, according to Livy, the fleet of Antiochus the Great was stationed, when, after reducing the towns of Cilicia as far as Selinus, he was engaged in the siege of Coracesium, and where he received the ambassadors of the Rhodians.
The AbC-19 rapid antibody test is an immunological test for COVID-19 exposure developed by the UK Rapid Test Consortium and manufactured by Abingdon Health. It uses a lateral flow test to determine whether a person has IgG antibodies to the SARS-CoV-2 virus that causes COVID-19. The test uses a single drop of blood obtained from a finger prick and yields results in 20 minutes. The sensitivity of this test is 98.03% while the specificity is 99.56%. This test is paired with an easy-to-use mobile app which allows a trained professional to generate an antibody test certificate for storing on a person's smartphone.
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