Nounspeed (plural speeds)
SynonymsFrom Wiktionary under the GNU Free Documentation License. In kinematics, the speed of an object is the magnitude of its velocity (the rate of change of its position); it is thus a scalar quantity. The average speed of an object in an interval of time is the distance traveled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero . Like velocity, speed has the dimensions of a length divided by a time; the SI unit of speed is the meter per second, but the most usual unit of speed in everyday usage is the kilometer per hour or, in the USA and the UK, miles per hour. For air and marine travel the knot is commonly used. The fastest possible speed at which energy or information can travel, according to special relativity, is the speed of light in vacuum c = 299,792,458 meters per second, approximately 1079 million kilometers per hour (671,000,000 mph). Matter cannot quite reach the speed of light, as this would require an infinite amount of energy. From Wikipedia under the
GNU Free Documentation License Find the speed of the electrons in a television? Q. Electrons in a television set are accelerated through a potential difference of 1.10 kV. (a) Find the speed of the electrons when they reach the screen. Ignore any relativistic effects. (b) When relativistic effects are included, do you expect the speed of the electrons to be greater than, less than, or the same as the result found in part (a)? Explain. (c) Find the speed of the electrons when they reach the screen, using a correct relativistic calculation. Asked by tcatlove52 - Fri Apr 23 22:09:11 2010 - - 1 Answers - 0 Comments A. First determine the energy gained by the electron: Use the equation: PE=q*V The voltage is given: 1.10 kV The charge of an electron is: -1.60217648740e-19 C (Take the positive value) PE = 1.60217648740e-19 C * 1.10 kV = 1.76239414e-16 J a) Without considering relativistic effects conversion of PE to KE is simply using KE = mv /2 mass of electron: 9.1093821545e-31 kg v = sqrt(2*KE/m) = sqrt(2*1.76239414e-16 J / 9.1093821545e-31 kg) v = 19 670 801.5 m/s b) When you take relativistic effects into account, the speed of the electrons would be less than the result in a, since when an object approaches the speed of light, its mass increases. Given a constant KE, as m increases, v decreases. c) The relativistic KE of a particle is KE = mc -… [cont.] Answered by Culture Nine - Fri Apr 23 23:39:56 2010 When there is a speed limit on a river how is the speed measured ? Q. Is the speed relative to the water or the land ? What about the difference between travelling upstream or downstream ? What if the speed of the flowing water is the same as, or greater than the speed limit - does that mean you can't go on the water ? Asked by John S2005 - Fri Apr 4 01:26:20 2008 - - 1 Answers - 0 Comments A. Its measured in knots and is speed over the water based the separation of objects in the water. Upstream is going against the flow, downstream is with the flow. Answered by Bandit - Fri Apr 4 01:36:49 2008 How can I find the speed of internet connection while working on a terminal?
Q. I want to know the speed with which I can access internet from my terminal. How can I do that? In windows if I place the mouse on the icon near the bottom I get the speed of LAN which is 100mbps. But how do I get the speed of internet connection? Is it true that when files are downloaded the speed is reduced? Asked by abhik s - Thu Nov 27 01:41:12 2008 - - 2 Answers - 0 Comments A. The 'speed' of an internet connection is actually a measure of the bandwidth available to transmit data. The more bandwidth available, the faster the connection seems to be, because more data can be piped through in the same amount of time. Websites like can be used to determine (with some accuracy) how much bandwidth is available on your connection. The more applications using bandwidth (e.g. downloads), the less bandwidth will be available for other applications, and hence the connection will seem slower. Answered by pythonpoole - Thu Nov 27 01:46:33 2008 From Yahoo Answer Search: "speed" Speed is the rate of motion, or equivalently the rate of change in position, often expressed as distance d traveled per unit of time t. This theme article is a stub. You can help Wikiquote by expanding it.Quotes
External linksWikipedia has an article about: Speed Look up Speed in Wiktionary, the free dictionaryFrom Wikiquote under the GNU Free Documentation License.  bloomberg.com Wed, 01 Sep 2010 15:19:20 GMT+00:00 Link Bloomberg From October, South Africa will investigate whether there is enough demand to justify the construction of a high- speed railway link between Johannesburg, ... South Africa and China Announce High Speed Rail Tieup AltTransport Govt identifies three high- speed rail links for development Creamer Media's Engineering News Facelift planned for SA's rail system Mail & Guardian Online AllAfrica.com  oklahomastate.scout.com Thu, 02 Sep 2010 20:41:57 GMT+00:00 OSUInsider.com (subscription) I think we can because what we lack in the senior leadership from last year we have made up in team speed . Our bond is strong, our chemistry is good. ...  wake.mync.com Thu, 02 Sep 2010 05:05:09 GMT+00:00 Rail Option In Raleigh MyNC.com High speed rail transportation between Charlotte and Washington - the government wants it, but some residents ... From Google News Search: "speed"  taospage.net 217px x 436px | 17.40kB [source page] cada dia sin darnos cuenta apenas de que los estamos tarareando Cuatro chicas que tienen un algo especial que las convierte en el mejor grupo de idols del Japon y del resto del mundo Speed esta formado por Hiroko Shimabukuro Eriko Imai Takako Uehara y Hitoe Arakaki Estas cuatro chicas se juntaron en Septiembre de 1995 cuando dejaron su residencia de Okinawa lugar  gronx.com 640px x 480px | 71.80kB [source page] Racer x inspector detector resaurus speed racer action figures series one speed trixie pops captain terror  detroitspeed.com 1300px x 994px | 33.60kB [source page] speedlinkspf jpg 11 Apr 2008 10 28 34k speed links main bac > 08 Jun 2006 13 23 86k speed links main2 jpg 18 Apr 2007 15 03 34k speed links main jpg 12 Feb 2007 14 58 53k From Yahoo Image Search: "speed"  librarium-online.com falsevariablex Wed, 01 Sep 2010 20:54:57 GM Hey all, I'm sure this has been asked before, but i'm not seeing it... What is the best and correct way to roll for multiple models with master-crafted. From Google Blog Search: "speed"  amazon.com Tue, 30 Sep 2008 05:35:23 PDT Hurtling down the track, careening around, over and through the competition, Speed Racer is a born natural behind the wheel. He's aggressive ... amazon.com.  video.google.com Sun, 15 Jul 2007 05:50:29 PDT Brilliant BBC Documentary. Jeremy Clarkson tries to find out why people enjoy going fast? To find out he tortures his mother on a rollercoaster ... video.google.com.  crunchyroll.com Wed, 18 Mar 2009 22:26:20 PDT Speed Racer / Race Around the World (Part ) - Episode 52 adobe's flash player. Get the latest flash player SD Report Video Problem Download ... crunchyroll.com. From Google Video Search: "speed" |
