In science and engineering, the weight of an object is related to the force acting on the object, either due to gravity or to a reaction force that holds it in place. Some standard textbooks define weight as a vector quantity, the gravitational force acting on the object. Others define weight as the magnitude of the gravitational force. Others define it as the magnitude of the reaction force exerted on a body by mechanisms that keep it in place: the weight is the quantity, measured by, for example, a spring scale. Thus, in a state of free fall, the weight would be zero. In this sense of weight, terrestrial objects can be weightless: ignoring air resistance, the famous apple falling from the tree, on its way to meet the ground near Isaac Newton, would be weightless; the unit of measurement for weight is that of force, which in the International System of Units is the newton. For example, an object with a mass of one kilogram has a weight of about 9.8 newtons on the surface of the Earth, about one-sixth as much on the Moon.
Although weight and mass are scientifically distinct quantities, the terms are confused with each other in everyday use. Further complications in elucidating the various concepts of weight have to do with the theory of relativity according to which gravity is modelled as a consequence of the curvature of spacetime. In the teaching community, a considerable debate has existed for over half a century on how to define weight for their students; the current situation is that a multiple set of concepts co-exist and find use in their various contexts. Discussion of the concepts of heaviness and lightness date back to the ancient Greek philosophers; these were viewed as inherent properties of objects. Plato described weight as the natural tendency of objects to seek their kin. To Aristotle and levity represented the tendency to restore the natural order of the basic elements: air, earth and water, he ascribed absolute weight to earth and absolute levity to fire. Archimedes saw weight as a quality opposed to buoyancy, with the conflict between the two determining if an object sinks or floats.
The first operational definition of weight was given by Euclid, who defined weight as: "the heaviness or lightness of one thing, compared to another, as measured by a balance." Operational balances had, been around much longer. According to Aristotle, weight was the direct cause of the falling motion of an object, the speed of the falling object was supposed to be directly proportionate to the weight of the object; as medieval scholars discovered that in practice the speed of a falling object increased with time, this prompted a change to the concept of weight to maintain this cause-effect relationship. Weight was split into a "still weight" or ponduscode: lat promoted to code: la, which remained constant, the actual gravity or gravitascode: lat promoted to code: la, which changed as the object fell; the concept of gravitascode: lat promoted to code: la was replaced by Jean Buridan's impetus, a precursor to momentum. The rise of the Copernican view of the world led to the resurgence of the Platonic idea that like objects attract but in the context of heavenly bodies.
In the 17th century, Galileo made significant advances in the concept of weight. He proposed a way to measure the difference between the weight of a moving object and an object at rest, he concluded weight was proportionate to the amount of matter of an object, not the speed of motion as supposed by the Aristotelean view of physics. The introduction of Newton's laws of motion and the development of Newton's law of universal gravitation led to considerable further development of the concept of weight. Weight became fundamentally separate from mass. Mass was identified as a fundamental property of objects connected to their inertia, while weight became identified with the force of gravity on an object and therefore dependent on the context of the object. In particular, Newton considered weight to be relative to another object causing the gravitational pull, e.g. the weight of the Earth towards the Sun. Newton considered space to be absolute; this allowed him to consider concepts as true velocity.
Newton recognized that weight as measured by the action of weighing was affected by environmental factors such as buoyancy. He considered this a false weight induced by imperfect measurement conditions, for which he introduced the term apparent weight as compared to the true weight defined by gravity. Although Newtonian physics made a clear distinction between weight and mass, the term weight continued to be used when people meant mass; this led the 3rd General Conference on Weights and Measures of 1901 to declare "The word weight denotes a quantity of the same nature as a force: the weight of a body is the product of its mass and the acceleration due to gravity", thus distinguishing it from mass for official usage. In the 20th century, the Newtonian concepts of absolute time and space were challenged by relativity. Einstein's equivalence principle put all observers, accelerating, on the same footing; this led to an ambiguity as to what is meant by the force of gravity and weight. A scale in an accelerating elevator cannot be distinguished from a scale in a gravitational field.
Gravitational force and weight thereby became frame-dependent quantities. This prompted the abandonment of the concept as superfluous in the fundamental sciences such as physics and chemistry. Nonetheless, the concept remained important in the teaching of physics; the ambiguities introduced by relativity led, starting in the 1960s, to considerable
Ideal College is one of the oldest private college offer higher secondary education for both boys and girls in Science and Humanities groups. As well as higher educational subjects are being operated among the students with contemporary concepts with skillfully in higher educational stages. Ideal College is located in the heart of Dhaka City, providing its contribution in endurable education for 5 decades. To create an enlightened nation this college was established in 1969. With its long journey Ideal College has been able to create its own permanent position to the heart of the Bangladeshi people. Teaching and co-curriculum activities are operated by teachers of this college. There are eighteen departments, eighty three teachers and around sixty administrative staffs in this college. In H. S. C. Level including 1st year and 2nd year, there is about four thousand students who are studying have as science and commerce discipline. Students perform variety of extracurricular activities outside from their academic curriculum.
Ideal College Debating Club Ideal College Photography Club Ideal College Science Club Ideal College Commerce Club Ideal College Cultural Club Ideal College Rover Scout Ideal College Blood Bank List of colleges in Bangladesh List of universities in Bangladesh Education in Bangladesh Official website
The Wetumpka Herald is a weekly newspaper serving Elmore County, Alabama. The Herald was founded as The Weekly Herald by Howell Rose Golson, he was succeeded by his son Howell Hunter Golson, making him one of the youngest editors in the state at that time. The elder Golson died in 1916 in an automobile accident. From 1916 to 1932, H. R. Golson's daughter, Frances Golson, served as the first woman editor-publisher of the Herald, running it with her brother. Described as "bright and marriageable" by the press, Frances Golson was the only woman delegate to the 1919 Alabama Press Association convention in Andalusia, Alabama. In 1949, a fire at the Herald building did extensive damage to both the equipment. From 1965 to 2003 the Herald was run by Ellen and Gerald WIlliams, they sold the paper in 2003 to former Alexander City Outlook editor Kim Price. At the time the Herald had a subscriber base of 15 employees. During the transition, Peggy Blackmon remained editor
Playlist: The Very Best of Our Lady Peace is a compilation album consisting of select remastered recordings by alternative rock band Our Lady Peace. It is the band's second compilation album following A Decade, released in 2006. Many popular favorites from Our Lady Peace, such as "One Man Army", "In Repair" and "Life", do not appear on the album; the album includes lesser-known band favorites including "Stealing Babies" and "The Wonderful Future". The album was released in the United States on March 31, 2009. "Starseed" "Naveed" "Superman's Dead" "Clumsy" "Car Crash" "Stealing Babies" "Are You Sad" "The Wonderful Future" "Somewhere Out There" "Innocent" "Not Enough" "Apology" "Angels Losing Sleep" "Wipe That Smile Off Your Face" Our Lady Peace discography A Decade Playlist
The 2006 Coca-Cola 600 was the 12th stock car race of the 2006 NASCAR Nextel Cup Series as well as the 47th running of the event. It was held on May 28, 2006, in Concord, North Carolina, at Lowe's Motor Speedway, before a crowd of 175,000 spectators; the circuit is an intermediate track. Kasey Kahne of the Evernham Motorsports team won the 400-lap race after he started from ninth position. Scott Riggs won the second pole position of his career by posting the fastest lap in qualifying, led 47 of the first 49 laps, until Jeff Gordon overtook him on lap 50; the lead changed a total of 37 times, with Kahne leading the most laps of any competitor. At the final restart on the 368th lap, Edwards led the field, held off Johnson in the second position. Kahne turned left to pass them both, reclaim the lead three laps later, he extended his advantage to more than two seconds and claimed his third victory of the season, the fourth of his career. There were a total of fifteen cautions during the race, sixteen different drivers each led at least one lap.
The result of the race advanced Kahne to sixth in the Drivers' Championship, 292 points behind Johnson. Roush Racing teammates Matt Kenseth and Mark Martin each finished in the top ten, moved to second and third, respectively. Tony Stewart of Joe Gibbs Racing fell from second to fourth after crashing on lap 34. In the Manufacturers' Championship, Chevrolet maintained its lead with 86 points, 14 points ahead of Ford in second, 16 in front of Dodge in third, with 24 races left in the season; the Coca-Cola 600 was the 12th of 36 scheduled stock car races of the 2006 NASCAR Nextel Cup Series, the event's 47th iteration. It was held on May 28, 2006 in Concord, North Carolina, at Lowe's Motor Speedway, an intermediate track that holds NASCAR races; the standard layout is a 1.5 mi four-turn quad-oval track. The track's turns are banked at twenty-four degrees. Before the race, Jimmie Johnson led the Drivers' Championship with 1,686 points, with Tony Stewart in second and Matt Kenseth third. Mark Martin and Dale Earnhardt, Jr. were fourth and fifth with 1,487 points and 1,460 points and Jeff Gordon, Kyle Busch, Kasey Kahne, Kevin Harvick and Jeff Burton rounded out the top ten drivers in the points standings.
In the Manufacturers' Championship, Chevrolet were leading with 80 points. Johnson was the race's defending champion. NASCAR mandated that teams used a 14 US gal fuel cell instead of the standard 22 US gal so that there would be fewer laps between pit stops and more tire changes could occur. Control tire supplier Goodyear brought a supply of harder compounds to ensure longevity; the Coca-Cola 600 was conceived by driver Curtis Turner. It was first held in 1960 in NASCAR's attempt to stage a Memorial Day weekend race to compete with the open-wheel Indianapolis 500; the race is the longest in distance on NASCAR's calendar, is considered by drivers to be one of the sport's most important races alongside the Daytona 500, the Brickyard 400 and the Southern 500. It is NASCAR's most physically demanding event, it was known as the World 600 until 1984 when The Coca-Cola Company purchased the race's naming rights, renaming it the Coca-Cola World 600 in 1985. It has been called the Coca-Cola 600 every year since 1986, except for 2002 when the name changed to Coca-Cola Racing Family 600.
After the previous race at Charlotte, the track's condition was beginning to deteriorate. Several cars sustained blown tires, multiple crashes occurred on the worn bumpy surface due to levigation, a process where a circuit's hard bumps were smoothed out; when that did not work, the entire track was repaved, with more than a 10,000 lb of asphalt used. The work was completed. Three practice sessions were held before the race; the first session on Friday afternoon lasted 90 minutes, the second on Saturday afternoon 60 minutes and the third held that day ran for 45 minutes. In the first practice session, Greg Biffle was fastest with a lap of 29.693 seconds, ahead of Kahne in second and Kurt Busch in third. Jeremy Mayfield was fourth-fastest. Jeff Green set the seventh-quickest time, Scott Riggs eighth, Kyle Busch ninth, Travis Kvapil completed the top ten ahead of qualifying. Stewart spun leaving the second turn. Tony Raines hit the wall, his pit crew repaired minor structural damage to his car on pit road.
J. J. Yeley pirouetted backward into the turn two wall late in the session. Robby Gordon's engine failed at around the same time, his team changed engines. Fifty-three cars were entered for the qualifying session on Thursday evening; each driver ran two laps, with the starting order determined by the competitor's fastest times. Cars that ventured onto the track early in qualifying were at a disadvantage because the track temperatures lowered as night fell. Riggs drove a different car following advice from his c
Zempin is a German municipality and the smallest seaside resort on Usedom island. It lies between Zinnowitz and Koserow on the narrowest part of the island, between the Baltic Sea and the Achterwasser, a bay of the Oder Lagoon. Zempin lies on an isthmus on the island of Usedom, it is located within the Usedom Nature Park and is one of the four so-called Amber Spas on the island, connected by a 12 km long fine sandy beach called Amber Beach. The other three amber spas are Koserow and Ückeritz; as of 2015, Zempin had a population of 938. The place has a station on the Usedom island railway; the place was mentioned for the first time in 1571. It was described as a farmer and fishery village and stood at first under Pomeranian Swedish and Prussian sovereignty. A beach hotel was built in 1895. In 1911, Zempin railway connection was established, joined the German bath federation in 1928 and in 1933 a sea-bridge was established. Between 1943 and 1945 in the forest area between Zinnowitz and Zempin three launching sites of V1 cruise missiles were built for experimental purposes.
Still today some remains are present. In 1956 a camping site was created and since 1990, Zempin has been nationally recognized as a seaside resort. Media related to Zempin at Wikimedia Commons Seebad Zempin