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Speed

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Snippet from Wikipedia: Speed

In kinematics, the speed (commonly referred to as v) of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a non-negative scalar quantity. The average speed of an object in an interval of time is the distance travelled 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. Speed is the magnitude of velocity (a vector), which indicates additionally the direction of motion.

Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second (m/s), but the most common unit of speed in everyday usage is the kilometre per hour (km/h) or, in the US and the UK, miles per hour (mph). 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 = 299792458 metres per second (approximately 1079000000 km/h or 671000000 mph). Matter cannot quite reach the speed of light, as this would require an infinite amount of energy. In relativity physics, the concept of rapidity replaces the classical idea of speed.

Time: Time in Buddhism, Present Fresh Wakefulness, Present Moment, Now, Three Times (Past-Present-Future), Today in History, Units of Time, Dates and times in programming languages: Programming language dates and times, Programming language dates, Programming language times: Java Time (java.time - java.time.chrono, java.time.format, java.time.temporal, java.time.zone), Java Chronology, Kotlin Time, Scala Time, Clojure Time, Groovy Time, JavaScript Time - TypeScript Time, Python Time, Bash Time, C Time, C++ Time, C# Time, COBOL Time, Dart Time, Fortran Time, Golang Time, PowerShell Time, Ruby Time, Rust Time; Date format - Time format, calendar (Module calendar), time (Module time, Time conversions, time zones (zoneinfo, Module zoneinfo, IANA time zone database), date (dateutil, Package dateutil, Orders of magnitude (time) (Millennium-Millenia, Centuries, Decades, Years, Months, Weeks, Days, Hours, Seconds, Nanoseconds, Picoseconds, Millisecond, Microsecond), International System of Units, Jiffy (time), date-time API, Temporal, Temporary, Speed - Velocity, Slow-Fast, Performance: Time Performance - Time Benchmark - Timing, Latency, Y2K, Time Travel, Memory - Remember, Lifetime-Time of Life (Birth-Old Age-Sickness-Death-Bardo-Rebirth), GitHub Time, Awesome Time. (navbar_time)


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speed.txt · Last modified: 2024/04/28 03:45 by 127.0.0.1

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