refimprove date March 2011 About velocity in physics Classical mechanics cTopic Fundamental concepts In physics , velocity is speed in a given direction. Speed describes only how fast an object is moving, whereas velocity gives both the speed and direction of the object s motion. To have a constant velocity ... per hour in a circular path does not have a constant velocity. The rate of change in velocity is acceleration. Velocity is a vector geometry vector physical quantity both magnitude and direction are required to define it. The scalar physics scalar absolute value Magnitude mathematics magnitude of velocity ... velocity v of an object moving through a displacement vector displacement math Delta mathbf d ... mathbf d Delta t . math The rate of change of velocity in m s as a function of time in s is acceleration ... at a particular point in time. Equation of motion main Equation of motion The velocity vector v of an object ... x t over Delta t mathrm d mathbf x over mathrm d t . math Average velocity magnitudes are always smaller than or equal to average speed of a given particle. Instantaneous velocity is always tangential to trajectory. Slope of tangent of position or displacement time graph is instantaneous velocity and its slope of chord is average velocity. The equation for an object s velocity can be obtained ... period time math t 0 math to some point in time later math t n math . The final velocity v of an object which starts with velocity u and then accelerates at constant acceleration a for a period of time math Delta t math is math mathbf v mathbf u mathbf a Delta t. math The average velocity of an object ... velocity and v is the final velocity. To find the position, x , of such an accelerating object ... t. math When only the object s initial velocity is known, the expression, math Delta mathbf x mathbf ... t frac 1 2 mathbf a Delta t 2, math These basic equations for final velocity and position can be combined ... is true for special relativity. In other words only relative velocity can be calculated. In Newtonian ... more details
Unreferenced date December 2006 Infobox Song See Wikipedia WikiProject Songs Name At This Velocity Cover Caption Type Artist Thursday band Thursday alt Artist Album A City by the Light Divided Published Released May 2, 2006 track no 2 Recorded Genre Post hardcore , Screamo , Post punk Length 2 59, 3 30 video edit Writer Geoff Rickly Rickly lyrics , Thursday band Thursday music Composer Label Island Records Island Producer Dave Fridmann Chart position Tracks The Other Side of the Crash Over and Out Of Control Counting 5 4 3 2 1 Sugar in the Sacrament At This Velocity We Will Overcome Arc Lamps, Signal Flares, a Shower of White The Light Running from the Rain Telegraph Avenue Kiss The Lovesong Writer Into the Blinding Light Autumn Leaves Revisited Even The Sand Is Made of Seashells Bonus Track Misc Extra musicsample filename At This Velocity is the second single from A City by the Light Divided , Thursday band Thursday s second and final release on Island Records . This song is featured in the skateboarding game Tony Hawk s Downhill Jam . Vocalist Geoff Rickly had this to say about the song Citation needed date June 2007 Cquote We were on tour a couple of years ago with the band called The Mars Volta ... we were in Australia and everything over there is so far apart that you have to fly to each show when you tour, you can t go on a bus or a van or any of that stuff. So we were on a flight going to our last show of the tour, and about 15 minutes before landing a little beep went off in the cabin, and at first I thought it was seatbelts. Instead it was the inflight movie with Haley Joel Osment , the worst little fuck ever, just froze on his face, and the whole plane started to drop very quickly and it was obvious that we weren t making a landing, that we were about to crash. So the whole thing went sideways, and I looked over at Ryan Primack Ryan from Poison the Well band ... to die. Is there anything else you can think of? Music video The music video for At This Velocity ... more details
Space velocity may be about, Space velocity astronomy , the velocity of a star in the Galactic coordinate system . Space velocity chemistry , the relation between volumetric flow and reactor volume in a chemical reactor . disambig ... more details
Wiktionary velocityVelocity is a quantity in physics which is related to speed . The word may also refer to Velocity novel Velocity novel , by US author Dean Koontz Velocity newspaper Velocity newspaper , a weekly alternative newspaper in Louisville, Kentucky published by The Courier Journal Velo city , a series of bicycling conferences held biannually in Europe Apache Velocity , a Java template engine USS Velocity USS Velocity , one of several U.S. Navy warships Velocity SE , homebuilt entry level canard pusher aircraft from Velocity Aircraft Velocity XL , homebuilt high performance canard pusher aircraft from Velocity Aircraft Velocity of money , a monetary economics equation Velocity comics , a comic book character Velocity Tower , a tower in Sheffield WWE Velocity , a professional wrestling television show VELOCITY Broadcasting , a broadcasting network in the United States Velocity album Velocity album , debut album of The Vels Velocity memory cache , a distributed memory cache from Microsoft Velocity software development , a measure of productivity sometimes used in agile software development Velocity, a type of Musical Instrument Digital Interface Messages Musical Instrument Digital Interface message reflecting how fast a key on a keyboard is pressed Velocity TV channel , a television channel owned by Discovery Communications formerly known as HD Theater and Discovery HD Theater disambig es Velocidad desambiguaci n fr Velocity it Velocity ja Velocity pl Pr dko ujednoznacznienie ... more details
Wave velocity is a wave property, which may refer to phase velocity , the velocity at which a wave phase propagates at a certain frequency pulse wave velocity , the velocity at which a pulse travels through a medium, usually applied to arteries as a measure of arterial stiffness group velocity , the propagation velocity for the envelope of wave groups and often of wave energy, different from the phase velocity for dispersive waves signal velocity or information velocity , which is the velocity at which a wave carries information front velocity , the velocity at which the first rise of a pulse above zero moves forward disambiguation ar zh ... more details
Wikify date April 2010 Orphan date September 2008 A velocity receiver is a sensor that responds to velocity rather than absolute position. For example, dynamic microphones are velocity receivers. Likewise, many electronic keyboards used for music are velocity sensitive, and may be said to possess a velocity receiver in each key. Most of these function by measuring the time difference between switch closures at two different positions along the travel of each key. DEFAULTSORT Velocity Receiver Category Transducers Tool stub ... more details
Orbital velocity can refer to the following The orbital speed of a body in a gravitational field. The velocity of particles due to wave motion, in particular in wind waves . The equivalent velocity of a bound electron needed to produce its orbital kinetic energy . disambig ... more details
Vertical velocity can refer to Either of two rollercoasters located in Six Flags amusement parks Vertical Velocity roller coaster V2 Vertical Velocity As a common noun, the term also refers to the movement of air masses upward as related in the omega equation . dab ... more details
Orphan date September 2008 Velocity overshoot is a result of transit times of a charge carriers in semiconductors charge carrier going from source to drain being smaller than the time required to emit an optical phonon . The velocity therefore exceeds the Velocity saturation saturation velocity , which leads to faster field effect transistor switching. This notion is utilized when the gate length is reduced to increase the switching speed. Category Charge carriers physics stub de Velocity overshoot ... more details
Superficial velocity or superficial flow velocity , in engineering of multiphase flow s and flows in porous media , is an hypothetical artificial fluid velocity calculated as if the given phase matter phase or fluid were the only one flowing or present in a given cross sectional area. Other phases, particles, the skeleton of the porous medium, etc. present in the channel are disregarded. Superficial velocity is used in many engineering equations because it is the value which is usually readily known and unambiguous, whereas real velocity is often variable from place to place, its mean not readily available in complex flow systems, and subject to assumptions. Superficial velocity can be expressed as math u s frac Q A math where u sub s sub superficial velocity of a given phase, m s Q volume flow rate of the phase, m sup 3 sup s A cross sectional area, m sup 2 sup Using the concept of porosity , the dependence between the advection velocity of fluid and the superficial velocity can be expressed as for one dimensional flow math u s phi v math where math phi math is porosity, dimensionless v is the advection velocity, m s. The local physical velocity can still be different than the advection velocity because the vector of the local fluid flow does not have to be parallel to that of average flow. Also, there may be local constriction in the flow channel. See also Volumetric flux Category Velocity Category Engineering pl Pr dko filtracji ... more details
USS Velocity is a name the U.S. Navy has used more than once in naming its warships USS Velocity 1862 USS Velocity 1862 , was a United Kingdom British blockade running schooner captured by USS Kensington 1861 USS Kensington and USS Rachel Seaman 1861 USS Rachel Seaman at Sabine, Texas, on 25 September 1862. USS Velocity SP 446 USS Velocity SP 446 was constructed at Morris Heights, Bronx Morris Heights , New York , by the noted boat builder, Charles L. Seabury, and owned by W. W. Stephens prior to World War I when she was inspected for naval service. USS Velocity AM 128 USS Velocity AM 128 , was a Minesweeper ship minesweeper laid down on 21 July 1941 at Chickasaw, Alabama . References DANFS External links http www.history.navy.mil danfs Anchor Editoria 14954 Dictionary of American Naval Fighting Ships Shipindex DEFAULTSORT Velocity, Uss Category United States Navy ship names pl USS Velocity ... more details
Orphan date November 2006 In reflection seismology , stacking velocity is the value of velocity obtained from the best fit hyperbola analysis. References http www.glossary.oilfield.slb.com Display.cfm?Term stacking 20velocity Schlumberger Oilfield Glossary DEFAULTSORT Stacking Velocity Category Geology Geology stub ... more details
for the Microsoft project codenamed VelocityVelocity memory cache nofootnotes date March 2010 Infobox Software name Apache Velocity logo Image Jakarta Velocity Logo.png Jakarta Velocity Logo screenshot ... engine license Apache License 2.0 website http velocity.apache.org Apache Velocity formerly known as Jakarta Velocity is an open source software project directed by the Apache Software Foundation . Velocity ... common types of applications that use Velocity are Web application s Web designer s create HTML pages ... of a number of frameworks which support Velocity. Source code generation Velocity can be used to generate ... and commercial development software package installation software packages use Velocity in this manner. ref cite web url http wiki.apache.org velocity PoweredByVelocity title PoweredByVelocity work Velocity Wiki publisher Wiki.apache.org date 2009 12 30 accessdate 2010 03 29 ref Automatic email ... sent reports. Using Velocity, the email web template template can be stored in a text file , rather than directly embedded in Java code. XML transformation Velocity provides an Apache Ant Ant task, called Anakia, which reads an XML file and makes it available to a Velocity template. A common application ... example The following web template template source lang xml Velocity Hello World html body set foo Velocity followed by Hello foo World body html source processed by Velocity will produce the following text source lang xml html body Hello Velocity World body html source The syntax and overall concept of the Apache Velocity templates is very similar to the syntax of the older WebMacro template engine ... first1 Rob last1 Harrop first2 Ian last2 Darwin date August 30, 2004 title Pro Jakarta Velocity From ... July 16, 2003 title Mastering Apache Velocity edition 1st publisher John Wiley & Sons Wiley page 372 ... links http velocity.apache.org Velocity at Apache http wiki.apache.org velocityVelocity wiki ... Apache Category Apache Software Foundation Velocity Category Java libraries Category Template engines ... more details
In turbomachinery , a velocity triangle or a velocity diagram is a triangle representing the various components of velocities of the working fluid in a turbomachinery turbomachine . Velocity triangles may be drawn for both the inlet and outlet sections of any turbomachine. The vector mathematics and physics vector nature of velocity is utilized in the triangles, and the most basic form of a velocity triangle consists of the tangential velocity, the absolute velocity and the relative velocity of the fluid making up three sides of the triangle. Velocities involved File Velocity triangle inlet example.jpg thumb right An example of a velocity triangle drawn for the inlet of a turbomachine. The 1 subscript denotes the inlet. A general velocity triangle consists of the following vectors ref name venkanna cite book last Venkanna first B.K. title Fundamentals of Turbomachinery year 2011 publisher Prentice Hall India isbn 978 81 203 3775 6 ref ref name govindegowda cite book last Govinde Gowda first M.S. title A Text book of Turbomachines year 2011 publisher MM Publishers location Davangere ref V Absolute velocity of the fluid. U Tangential velocity of the fluid. V sub r sub Relative velocity of the fluid after contact with rotor turbine rotor . V sub w sub Tangential component of V absolute velocity , called Whirl velocity . V sub f sub Flow velocity axial component in case of axial machines, radial component in case of radial machines . The following angles are encountered during the analysis Angle made by V with the plane of the machine usually the nozzle angle or the guide blade angle . Angle of the rotor blade. References Reflist Category Mechanical engineering Category Fluid mechanics ... more details
Unreferenced date December 2009 The thermal velocity or thermal speed is a typical velocity of the thermal motion of particles which make up a gas, liquid, etc. Thus, indirectly, thermal velocity is a measure of temperature. Technically speaking it is a measure of the width of the peak in the Maxwell Boltzmann distribution Distribution of the velocity vector Maxwell Boltzmann particle velocity distribution . Note that in the strictest sense thermal velocity is not a velocity , since velocity usually describes a vector geometric vector rather than simply a scalar physics scalar speed . Since the thermal velocity is only a typical velocity, a number of different definitions can be and are used. Taking math k B math to be the Boltzmann constant , math T math is the temperature, and math m math is the mass of a particle, then we can write the different thermal velocities In one dimension If math v th math is defined as the root mean square of the velocity in any one dimension i.e. any single direction , then math v th sqrt frac k BT m math If math v th math is defined as the mean of the magnitude of the velocity in any one dimension i.e. any single direction , then math v th sqrt frac 2 k BT pi m math If math v th math is defined as the math 1 e math half width of the thermal distribution or if math v th math is defined such that a particle with this speed has an energy of math k B T math , then math v th sqrt frac 2k BT m math . In three dimensions If math v th math is defined as the root mean square of the total velocity in three dimensions , then math v th sqrt frac 3k BT m math . If math v th math is defined as the mean of the magnitude of the velocity of the atoms or molecules, then math v th sqrt frac 8k B T m pi math DEFAULTSORT Thermal Velocity Category Thermodynamics Category Statistical mechanics Physics stub ru ... more details
Shear velocity , also called friction velocity , is a form by which a shear stress may be re written in units of velocity . It is useful as a method in fluid mechanics to compare true velocities, such as the velocity of a flow in a stream, to a velocity that relates shear between layers of flow. Shear velocity is used to describe shear related motion in moving fluids. It is used to describe Diffusion and Dispersion water waves dispersion of particles, tracers, and contaminants in fluid flows The velocity profile near the boundary of a flow see Law of the wall Transport of sediment in a channel Shear velocity also helps in thinking about the rate of shear and dispersion in a flow. Shear velocity scales well to rates of dispersion and bedload sediment transport. A general rule is that the shear velocity is about 1 10 of the mean flow velocity. math u star sqrt frac tau rho math Where math tau math is the shear stress in an arbitrary layer of fluid and math rho math is the density of the fluid. Typically, for sediment transport applications, the shear velocity is evaluated at the lower boundary of an open channel math u star sqrt frac tau b rho math Where math tau b math is the shear stress given at the boundary. Shear velocity can also be defined in terms of the local velocity and shear stress fields as opposed to whole channel values, as given above . References Whipple, K. X 2004 , III Flow Around Bends Meander Evolution, 12.163 Course Notes, MIT. http ocw.mit.edu courses earth atmospheric and planetary sciences 12 163 surface processes and landscape evolution fall 2004 lecture notes 3 flow around bends.pdf DEFAULTSORT Shear Velocity Category Fluid mechanics Category Geology Category Geomorphology Category Sedimentology fluiddynamics stub geophysics stub de Schubspannungsgeschwindigkeit ... more details
Expert subject physics date May 2009 Originally, in superconducting transmission lines, the Swihart velocity is the propagation velocity of electromagnetic waves along transmission line. Swihart velocity plays an important role in the physics of long Josephson junction s LJJ that, in essence, are superconducting transmission lines with dispersion and nonlinearity due to Josephson effect . In LJJ , Swihart velocity is a characteristic velocity of propagation of electromagnetic waves aka Josephson plasma waves , see long Josephson junction for details. For example, the group velocity may have any value from zero up to Swihart velocity. References cite journal author J. C. Swihart year 1961 title Field Solution for a Thin Film Superconducting Strip Transmission Line journal J. Appl. Phys. volume 32 issue 3 pages 461 469 doi 10.1063 1.1736025 bibcode 1961JAP....32..461S Category Superconductivity Category Josephson effect ... more details
Image Velocity N6971T 071008 04 16.jpg thumb right Velocity SE RG at the Mojave Spaceport Image Xcor rocketracer N216MR 071029 07cr 7.jpg thumb right The prototype Rocket Racer, a modified Velocity SE climbing to convert 10000 ft m on it first full flight, October 29, 2007 at the Mojave Spaceport Image Xcor rocketracer N216MR 071029 37cr 16.jpg thumb right The Rocket Racer on landing roll out at Mojave. Image Xcor rocketracer N216MR 071029 39cr 16.jpg thumb right Aft view of the Rocket Racer on landing roll out at Mojave. The Velocity SE is the entry level canard aeronautics canard Pusher configuration pusher aircraft from Velocity Aircraft . ref name va SE2008 http www.velocityaircraft.com airplane models se.html Velocity SE , Velocity Aircraft website, 2008, accessed 2010 12 11. ref ref name KitplanesDec2011 Vandermeullen, Richard 2011 Kit Aircraft Buyer s Guide , Kitplanes, Volume 28, Number 12, December 2011, page 75. Belvoir Publications. ISSN 0891 1851 ref The four seat, rear engine aircraft may be powered by a Lycoming IO 320 160 hp or a Lycoming Lycoming O 360 IO 360 IO 360 200 hp engine. ref name va SE2008 Variants Velocity SE FG Fixed landing gear version, 88 completed and flown by December 2011. ref name KitplanesDec2011 Velocity SE RG Retractible landing gear version,180 completed and flown by December 2011. ref name KitplanesDec2011 See also Velocity XL Rutan Long EZ Rutan VariEze Rutan Defiant Berkut aircraft Cozy MK IV References Reflist External links Commons category Velocity aircraft http www.velocityaircraft.com Velocity aircraft Velocity Aviation lists Aero specs missing DEFAULTSORT Velocity Se Category United States civil utility aircraft 1990 1999 Category Canard aircraft Category Homebuilt aircraft Category Pusher aircraft aero 1990s stub ... more details
Unreferenced date March 2009 A velocity potential is used in fluid dynamics , when a fluid occupies a simply connected region and is irrotational . In such a case, math nabla times mathbf u 0, math where math mathbf u math denotes the flow velocity of the fluid. As a result, math mathbf u math can be represented as the gradient of a scalar field scalar function math Phi math math mathbf u nabla Phi math , math Phi math is known as a velocity potential for math mathbf u math . A velocity potential is not unique. If math a math is a constant then math Phi a math is also a velocity potential for math mathbf u math . Conversely, if math Psi math is a velocity potential for math mathbf u math then math Psi Phi b math for some constant math b math . In other words, velocity potentials are unique up to a constant.If value of satisfies Laplace equation ,it indicates case of fluid flow. Unlike a stream function , a velocity potential can exist in three dimensional flow. See also Hamiltonian fluid mechanics Potential flow DEFAULTSORT Velocity Potential Category Fluid dynamics Category Equations of fluid dynamics Fluiddynamics stub zh ... more details
Sound measurements Particle velocity is the velocity v of a particle real or imagined in a Transmission medium medium as it transmits a wave . In many cases this is a longitudinal wave of pressure as with sound ... to a sound wave through a medium of a fluid like air, particle velocity would be the physical speed .... Particle velocity should not be confused with the speed of the wave as it passes through the medium, i.e. in the case of a sound wave, particle velocity is not the same as the speed of sound ... small particle velocity. Particle velocity should also not be confused with the velocity of individual molecules. In applications involving sound, the particle velocity is usually measured using a logarithmic decibel scale called particle velocity level . Equations in terms of other measurements The velocity v can be related to the particle displacement math xi math and acceleration for single ... math class wikitable Symbol Units Meaning v Meters per second m s particle velocity m, meters particle ... math rho math Kg m 3 Air Density Particle velocity level The particle velocity level or the sound velocity level tells the ratio of a sound incidence in comparison to a reference level of 0 dB in a medium, mostly air. It shows the ratio of the particle velocity v sub 1 sub and the particle velocity v sub 0 sub . The particle velocity level is math L v 20 , log 10 left frac v 1 v 0 right mathrm dB math where v sub 1 sub and v sub 0 sub are the velocities. The particle velocity level has the letter L sub v sub . The Units of measurement unit of the particle velocity level is named dB . Notice The decibel dB is dimensionless. If v sub 0 sub is the standard reference particle velocity of math v 0 5.0 times 10 8 mathrm frac m s math we use dB SVL . SVL sound velocity level . Sound particle velocity v should not be confused with Sound velocity c . See also Sound particle Particle displacement ... sound wave pdf http www.microflown.com The particle velocity can be directly measured with a Microflown ... more details
Peculiar motion or peculiar velocity refers to the true velocity of an object, relative to a rest frame. Galactic astronomy In galactic astronomy , the term peculiar motion or peculiar velocity refers to the motion of an object usually a star through space. Local objects are usually related in terms of proper motion and radial velocity , that is the amount an object appears to move across the sphere of the heavens, and the measured speed at which it travels towards or away from us, respectively. Its actual motion is the peculiar motion. Cosmology In physical cosmology , the term peculiar velocity or peculiar motion refers to the components of a receding galaxy s velocity that cannot be explained by Hubble s law . According to Hubble, and as verified by many astronomers, a galaxy is receding from us at a speed proportional to its distance. The relationship between speed and distance would be exact in the absence of other effects. Galaxies are not distributed evenly throughout observable space, but typically found in groups or galaxy cluster clusters , ranging in size from fewer than a dozen to several thousands. All these nearby galaxies have a gravitational effect, to the extent that the original galaxy can have a velocity of over 1,000 km second s in an apparently random direction. This velocity will therefore add, or subtract, from the radial velocity that one would expect from Hubble s law. The main consequence is that, in determining the distance of a single galaxy, a possible error must be assumed. This error becomes smaller, relative to the total speed, as the distance increases. A more accurate estimate can be made by taking the average velocity of a group of galaxies the peculiar velocities, assumed to be essentially random, will cancel each other, leaving a much more accurate measurement. References David Darling , Internet Encyclopedia of Science , http www.daviddarling.info ... velocity accessed 11 April 2010 Category Extragalactic astronomy Category Galactic astronomy physics ... more details
Infobox company name Velocity, Inc. logo type Private company genre foundation 1984 founder Danny Maher ... http www.velocityaircraft.com www.velocityaircraft.com footnotes intl Velocity, Inc. is an United ... was changed, adding a gull wing door design. ref name km199512 Velocity 173 Elite, Kitplanes Magazine , December 1995, vol. 12, issue 12, pp. 6. ref In 2008, a power failure and crash of a Velocity ... Rocket Racer at Tulsa International Airport, April 2010 In 2008 Velocity received an order for 20 ... news art6915 velocity aircraft receives purchase order for 20 velocity xl 5 039 s.html Velocity Aircraft Receives Purchase Order For 20 Velocity XL 5 s , Space Fellowship , 2008 10 08, accessed ... of the Rocket Racing League, acquired Velocity Aircraft. The RRL announced their goal was to produce ... 2008 04 14 rocket racing composite corp acquires velocity aircraft Rocket Racing Composite Corp. Acquires Velocity Aircraft , Parabolic Arc , 2008 04 14, accessed 2010 12 05. ref On May 26, 2010, a Velocity employee posted to the builder s email list a note from Scott and Duane Swing that stated that they had bought back full ownership of Velocity Inc from Rocket Racing League. The RRL now owns no share of Velocity Inc. ref name tvbf20100526 Talk Velocity, Inc. Source for the claim that the Swing family has purchased the company back from RRL Swing Family Repurchase of Velocity Inc. from Rocket Racing League , Velocity Aircraft Listserve, text copy from tvbf.org archives, 2010 05 26. For those of you wondering just what influence Rocket Racing has with Velocity, let me assure you that they have none. As I write this, the sole ownership of Velocity Inc. is now totally and completely ... our Rocket Racing stock for 100 return of the stock they held in Velocity Inc. Rocket Racing now has ... the first Velocity in 1985. First Flight was in October 1985. The plane was debuted at Sun N ... comfortable interior. ref Velocity, Sport Aviation, April 1986, pp.40 ref In 1992, Velocity introduced ... more details
Unreferenced date December 2009 Infobox single Name Velocity Shift Cover Velocity Shift.jpg Artist Rob Overseer Overseer from Album Wreckage album Wreckage Released August 2005 Format ITunes Recorded 2005 Genre Big Beat Length 2 minute m 09 second s Label When Records Producer Rob Overseer Chart position Reviews Last single Slayed br 2003 This single Velocity Shift br 2005 Next single Doomsday br 2005 Velocity Shift is a single by the Big Beat artist Rob Overseer Overseer from his album Wreckage album Wreckage . It is well known for being an adrenaline pumping, ambient tune. It was featured in the 2004 film, Blade Trinity . The vocals are done by Chris Live. Category 2005 singles ... more details
Velocity Magazine is a monthly youth culture magazine published in the Omaha, Nebraska Omaha , Nebraska metropolitan area. Debuting in November 2005, it became the first publication specifically for and about Millennial Generation Gen Y in the eastern Nebraska and western Iowa region. Its monthly content ranges from Education, Sports, Media, Technology, Gaming, and Student Submissions. Velocity s Editor In Chief, John Sullivan, also encourages students to submit articles for publication on a regular basis. In its second issue, Velocity published an exclusive interview with Robb Nansel , the President of Saddle Creek Records . Besides having normal distribution spots throughout the area, it is also available in 85 high schools within a 50 mile radius of Omaha. External links http www.velocitymetro.com Velocity Magazine Category American magazines Category Publications established in 2005 ... more details
Unreferenced date December 2009 Orphan date December 2009 Image Velocity selector.svg thumb right 300px A velocity selector A velocity selector is used in accelerator mass spectrometry to select particles based on their speed. The velocity selector is composed of orthogonal electric and magnetic fields, such that particles with the correct charge to mass ratio and speed will be unaffected, and other particles will be deflected. Theory Any charged particle in an electric field will feel a force proportional to the charge and field strength such that math vec F q vec E math , where F is force, q is charge, and E is electric field. Similarly, any particle moving in a magnetic field will feel a force proportional to the velocity and charge of the particle. The force felt by any particle is then equal to math vec F q vec v times vec B math , where F is force, q is the charge on the particle, v is the velocity of the particle, B is the strength of the magnetic field, and math times math is the cross product . In the case of a velocity selector, the magnetic field is always at 90 degrees to the velocity and the force is simplified to math F qvB math in the direction described by the cross product. Setting the two forces to equal magnitude in opposite directions it can be shown that math frac E B v math . Which means that any combination of electric math vec E math and magnetic math vec B math fields will allow charged particles with only velocity math vec v math through. DEFAULTSORT Velocity Selector Category Mass spectrometry Category Particle accelerators ar ko ... more details
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