Search results
Results from the WOW.Com Content Network
In fluid dynamics, dynamic pressure (denoted by q or Q and sometimes called velocity pressure) is the quantity defined by: [1] = where (in SI units): q is the dynamic pressure in pascals (i.e., N/m 2, ρ (Greek letter rho) is the fluid mass density (e.g. in kg/m 3), and; u is the flow speed in m/s.
As the velocity of the runner increases, inertia and air resistance effects become the limiting factors on the sprinter's top speed. It was previously believed that there was an intramuscular viscous force that increased proportionally to the velocity of muscle contraction that opposed the contractile force; this theory has since been disproved ...
The record is 44.72 km/h (27.78 mph), measured between meter 60 and meter 80 of the 100 meters sprint at the 2009 World Championships in Athletics by speed. [4] [5] (Bolt's average speed over the course of this race was 37.578 km/h or 23.35 mph.) [6] Compared to quadrupedal animals, humans are exceptionally capable of endurance, but incapable of great speed. [7]
Dimensionless numbers (or characteristic numbers) have an important role in analyzing the behavior of fluids and their flow as well as in other transport phenomena. [1] They include the Reynolds and the Mach numbers, which describe as ratios the relative magnitude of fluid and physical system characteristics, such as density, viscosity, speed of sound, and flow speed.
In its simplest electronic form, the instrument consists of an air bottle connected to the external atmosphere through a sensitive air flow meter. As the aircraft changes altitude, the atmospheric pressure outside the aircraft changes and air flows into or out of the air bottle to equalise the pressure inside the bottle and outside the aircraft.
Former Texas Longhorns wide receiver Xavier Worthy is the fastest man the NFL scouting combine has ever seen. He was clocked at a lightning time of 4.21 seconds on his second attempt, besting John ...
A supportive crowd at Paris' Stade de France national stadium rallied around Britain's Megan Keith as she crossed the finish line for the women's 10,000m final Aug. 9 by herself.
As an exception, according to rule 36.2, specific event organizers may choose to ignore wind velocity readings exclusively for their specific event records (e.g. a performance in a 100 m race at a meeting with a wind reading of +2.4 m/s may be considered that specific meeting record, but will not be considered as a world record). [1]