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2. Regularity rally - Wikipedia

   en.wikipedia.org/wiki/Regularity_rally

   A regularity rally, also called time-speed-distance or TSD rally, is a type of motorsport rally with the object of driving each segment of a course in a specified time at a specified average speed. The rally is usually conducted on public roads, but sometimes includes off-road and track sections.

3. Speedtest.net - Wikipedia

   en.wikipedia.org/wiki/Speedtest.net

   The domain speedtest.net has been used to host a speed test since 2000, and was acquired by Ookla in 2006. [12] As of 2011, Ookla claimed 80% market share and was one of the top 1000 most popular websites. At the time, Ookla derived its revenue primarily from fees paid by companies to license custom speed test and proprietary testing software.

4. Fourth, fifth, and sixth derivatives of position - Wikipedia

   en.wikipedia.org/wiki/Fourth,_fifth,_and_sixth...

   Snap, [6] or jounce, [2] is the fourth derivative of the position vector with respect to time, or the rate of change of the jerk with respect to time. [4] Equivalently, it is the second derivative of acceleration or the third derivative of velocity, and is defined by any of the following equivalent expressions: = ȷ = = =.

5. Speedometer - Wikipedia

   en.wikipedia.org/wiki/Speedometer

   The indicated speed must not be more than 110 percent of the true speed plus 4 km/h (2.5 mph) at specified test speeds. For example, at 80 km/h (50 mph), the indicated speed must be no more than 92 km/h (57 mph). The standards specify both the limits on accuracy and many of the details of how it should be measured during the approvals process.

6. 40-yard dash - Wikipedia

   en.wikipedia.org/wiki/40-yard_dash

   In terms of judging a person's speed, the best method of timing is through lasers which start and stop the times when passed through. A laser start (from a stationary position) is more accurate for measuring pure speed as it does not register a runner's reaction time, however, this method of timing a 40-yard dash can affect the accuracy by as much as 0.5 seconds with the manual stopwatch method.

7. Stimpmeter - Wikipedia

   en.wikipedia.org/wiki/Stimpmeter

   The distance travelled by the ball in feet is the 'speed' of the putting green. Six distances, three in each of two opposite directions, should be averaged on a flat section of the putting green. The three balls in each direction must be within 8 inches (20 cm) of each other for USGA validation of the test. [7]

8. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. Speed - Wikipedia

   en.wikipedia.org/wiki/Speed

   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; [2] 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 ...