Deflection

Deflection - In physics. In physics deflection is the event where an object collides and bounces against a plane surface. In such collisions involving a sphere and a plane, the collision angle formed with the surface normal (the incidental angle α) must equal the bounce angle (the accidental angle β), α = β See also. reflection impulse Including:

Deflection: Encyclopedia II - Vertical deflection - Determination of vertical deflections The deflections are connected with the local and regional undulations of the geoid — and also with gravity anomalies — for they are functionals of the gravity field and its inhomogeneities. VDs are usually determined astronomically. The true zenith is observed astronomically with respect to the stars, and the ellipsoidal zenith (theoretical vertical) by geodetic network computation, which always takes place on a reference ellipsoid. Additionally, the very local variations of the VD can be computed from gravimetric survey data and by means of digital ...

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Bending - Stress in a beam

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Deflection: Encyclopedia - Young's modulus

In solid mechanics, Young's modulus (also known as the modulus of elasticity or elastic modulus) is a measure of the stiffness of a given material. It is defined as the limit for small strains of the rate of change of stress with strain. This can be experimentally determined from the slope of a stress-strain curve created during tensile tests conducted on a sample of the material. Young's modulus is named after Thomas Young the English physicist, physician, and Egyptologist. Young's modulus - Units. Including:

Young's modulus - Calculation

Young's modulus - Approximate values

Deflection: Encyclopedia - Armageddon film

Armageddon is a 1998 disaster film/science fiction film about a group of blue-collar deep-core drillers who are sent by NASA to deflect an asteroid on a collision course with Earth. It was directed by Michael Bay and produced by Jerry Bruckheimer, and featured Bruce Willis, Billy Bob Thornton, Ben Affleck and Liv Tyler. The film's tagline is For Love. For Honor. For Mankind. Armageddon was released during a period when disaster movies were seeing a comeback. Another asteroid impact movie, Deep Impact, was made the same year, along with a reprise of Godzilla. Th ...

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Deflection: Encyclopedia - Billiards

Billiards is a family of games played on a table, with a stick, known as a cue stick, which is used to strike balls, moving them around the table. All billiard games are generally regarded to have evolved into indoor games from outdoor stick and ball games.[1] The word billiard may have evolved from the French word 'billart' which means mace, the forerunner to the modern cue. The word pool generally refers to pocket billiard gam ...

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Billiards - Equipment

Billiards - Types of games carom and pocket

Billiards - Billiards and pocket billiards games

Deflection: Encyclopedia - 99942 Apophis

99942 Apophis (previously better known by its provisional designation 2004 MN4) is a Near-Earth asteroid that caused a brief period of concern in December 2004 because initial observations indicated a relatively large probability that it would strike the Earth in 2029. However, additional observations provided improved predictions that eliminated the possibility of an impact on Earth or the Moon in 2029. A future impact on April 13, 2036, is still possible, keeping the asteroid at level 1 on the Torino impact hazard ...

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Deflection: Encyclopedia - Bremsstrahlung

Bremsstrahlung, (from the German bremsen, to brake and Strahlung, radiation), is electromagnetic radiation produced by the acceleration of a charged particle, such as an electron, when deflected by another charged particle, such as an atomic nucleus. The term is also used to refer to the process of producing the radiation. Bremsstrahlung has a continuous spectrum. The phenomenon was discovered by Nikola Tesla during high frequ ...

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Deflection: Encyclopedia - De-escalation

De-escalation is an approach to conflict resolution and reducing tension during the discussion of controversial topics. This often involves techniques such as taking a time-out, and deflecting the conversation to individuals in the group who are less passionately involved. Other related archivesconflict resolution, controversial, discussion, tension, time-out

Deflection: Encyclopedia II - Asteroid deflection strategies - Fiction

Asteroid or comet impacts are a common subgenre of disaster fiction, and such stories typically feature some attempt - successful or unsuccessful - to prevent the catastrophe. Most involve trying to destroy or explosively redirect an object, perhaps understandably from the direction of dramatic interest. Science Fiction authors Charles Sheffield and Arthur C. Clarke (Sunstorm) have also written of a "cosmic bullet" extraterrestial intelligence threat consisting of a projectile aimed at our sun at near light speed. In the openin ...

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Read more here: » Bodyline: Encyclopedia - Bodyline

Deflection: Encyclopedia - Atomic force microscope

The atomic force microscope (AFM) is a very powerful microscope invented by Binnig, Quate and Gerber in 1986. Besides imaging it is also one of the foremost tools for the manipulation of matter at the nanoscale. The AFM consists of a cantilever with a sharp tip at its end, typically composed of silicon or silicon nitride with tip sizes on the order of nanometers. The tip is brought into close proximity of a sample surface. The Van der Waals force between the tip and the sample leads to a deflection of the cantilever according t ...

Deflection: Encyclopedia - Buckler

A buckler (French bouclier 'shield', from old French bocle, boucle 'boss') is a small shield gripped in the fist -- it was generally used in hand-to-hand combat during the Middle Ages, as its size made it poor protection against missile weapons (e.g., arrows) but useful in deflecting the blow of an opponent's sword or mace. There are two major forms of surviving and medievally documented bucklers. The first is a simple round shield with the fist positioned directly behind the boss with a variety of shapes of face and dep ...

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Buckler - Uses

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Deflection: Encyclopedia - Bye cricket

In the sport of cricket, a bye is a run scored by the batting team when the ball has not been hit by the batsman and the ball has not hit the batsman's body. Normally, if the ball passes the batsman without being deflected, the wicket-keeper will catch it. This normally prevents the scoring of runs because the batsmen will be unable to complete a run before being run out by the wicket-keeper. However, if the wicket-keeper fumbles or misses the ball, the batsmen may be able to score runs safely, and may choose to do so. The number of runs scored are scored as byes - they are added to the team's total, but ...

Deflection: Encyclopedia - Windage

Windage is a force created on an object by friction when there is relative movement between air and the object. There are two possible causes of windage: the object is moving and being slowed by resistance from the air a wind is blowing producing a force on the object The term can refer to : either, the effect of the force, for example the deflection of a missile or an aircraft by a cross wind or, the area and shape of the object that make it susceptible to friction, for example those parts of a boat that are exposed to the wind. Aerodynamic stre ...

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Deflection: Encyclopedia II - Asteroid deflection strategies - Early detection

Any deflection effort would require the object in question to be identified years in advance of the projected impact, allowing for expenditure of sufficient time and resources to build a slow-pusher device or an explosive device unlike any currently existing. Don Yeomans, manager of NASA's Near Earth Object Monitoring program, said that 10 years or more of advance warning would be needed for it to be pract ...

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Deflection

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