The phrase "a precise velocity" is correct and usable in written English.
It can be used in contexts where you need to specify an exact speed or rate of motion, often in scientific or technical discussions.
Example: "The rocket achieved a precise velocity of 7,500 meters per second during its launch."
Alternatives: "an exact speed" or "a specific rate".
A particle wave having a well-defined wavelength, on the other hand, is spread out; the associated particle, while having a rather precise velocity, may be almost anywhere.
Therefore, we propose a novel design of a spatial magnetic spin resonator, allowing precise velocity selection as well as the accurate definition of the beam's time structure by purely tuning electronic parameters.
Plavchan, P. et al. EarthFinder: A precise radial velocity probe mission concept for the detection of Earth-mass planets orbiting Sun-like stars.
And, because B- and A-type stars do not have spectral lines that allow precise velocity measurements, this method cannot reveal anything about their having planets.
The uncertainty principle suggests that you cannot know both the precise location and the precise velocity of anything.
The majority of motion-control applications require precise velocity and position control.
The league's Internet portal, mlb.com, is beginning to outfit every stadium with a three-dimensional camera system that will measure everything that happens on the field, from the exact trajectory of fly balls to the precise velocity of the fielders who chase them.
Precise velocity structure in the study region is essential for accurate hypocenter location.
Recently, the remarkable advancement of technologies for studying seismic refraction and reflection (e.g., GPS navigation systems, Ocean Bottom Seismographs (OBS), analytical methods, calculation performance of computers) has allowed for the acquisition of more precise velocity structures (e.g., Kasahara et al., 2007; Oshida et al., 2008).
