Search results

{{short description|Air pressure differential between two areas}} ...owards ambient pressure (blown out) or from ambient pressure towards a low pressure zone (sucked in). Gases and liquids cannot generate pulling forces on objec ...

...fter [[David Brunt]] and [[Vilho Väisälä]]. It can be used as a measure of atmospheric stratification. where the Brunt–Väisälä frequency <math>N</math> is:<ref>{{Cite book|title=Atmospheric and oceanic fluid dynamics: fundamentals and large-scale circulation|last=V ...

...value of the [[gravitational acceleration]], which varies with location. [[Pressure]] may also affect values, depending upon the [[bulk modulus]] of the materi |+ Specific weight of water at standard sea-level atmospheric pressure (Metric units) <ref name="fluids" /> ...

.... When designing [[building]]s to prevent against failure from atmospheric pressure change, RMW can be used in the calculations.<ref>Donald W. Burgess and Mich ...aps]] as the distance between the cyclone center and the system's greatest pressure gradient.<ref>{{cite web|url=http://www.esl.lsu.edu/quicklinks/publications ...

{{Short description|Variation in pressure as a function of elevation}} ...elevation as well, and these variations have relevance in the context of [[pressure gradient force]] and its effects. However, the vertical variation is especi ...

...ductivity and performance of processes otherwise carried out at normal air pressure, or may make possible processes that could not be done in the presence of a ...red vacuum pressure to be achieved. For a "rough" vacuum, over 100 Pascals pressure, conventional methods of analysis, materials, pumps and measuring instrumen ...

...[[atmospheric pressure]], the CIPM needed to define a standard atmospheric pressure. The definition they chose was based on the weight of a column of [[mercury ...

...cess-date=2021-04-01|website=en.wikibooks.org|language=en}}</ref> and "the pressure in a fluid or exerted by a fluid on an immersed body".<ref name="MW diction ...l field]]), to [[meteorology]], to [[medicine]] (in the context of [[blood pressure]]), and many other fields. ...

...oltages also increase with the gas pressure. Many gases have limited upper pressure due to their [[liquefaction]]. [[Atmospheric pressure]] significantly influences the insulation properties of air. High-voltage a ...

...on two steel plates as electrode. The discharge is taking place in normal atmospheric air, at about 30 kHz, with a discharge gap of about 4&nbsp;mm. The ''foot'' ...h the glass walls acting as the dielectric barrier. Due to the atmospheric pressure level, such processes require high energy levels to sustain. Common dielect ...

{{Short description|Local pressure deviation caused by a sound wave}} ...to the direction of the sound|url=http://www.engineeringtoolbox.com/sound-pressure-d_711.html|access-date=22 April 2015}}</ref> ...

...e sum of the momentum difference between entry and exit and any unbalanced pressure force between entry and exit, as explained in "Thrust calculation". ...ck box" shows that the thrust results from all the unbalanced momentum and pressure forces created within the engine itself.<ref>The Aircraft Gas Turbine and i ...

Earth atmospheric neutron flux, apparently from thunderstorms, can reach levels of 3·10<sup>− ...V. |last2=Ptitsyn |first2=M. O. |year=2015 |title=Comment on "Decrease of Atmospheric Neutron Counts Observed during Thunderstorms" |journal=Physical Review Lett ...

...aplace's coefficient''', is the ratio of the [[heat capacity]] at constant pressure ({{mvar|C_P}}) to heat capacity at constant volume ({{mvar|C<sub> γ was expressed as a function of density D (p. 8) or of pressure P (p. 9).<br> ...

....29&nbsp;g/L (gram per liter) at [[standard conditions for temperature and pressure]] (STP) and an average molecular mass of 28.97&nbsp;[[Molar mass|g/mol]],<r Heated atmospheric air is frequently used in [[hot air balloon|recreational ballooning]]. Acco ...

...s 20Hz to 20kHz, the limits of human hearing}}</ref> In air at atmospheric pressure, these represent sound waves with [[wavelength]]s of {{convert|17|m|feet}} Sound propagates as mechanical vibration waves of pressure and displacement, in air or other substances.<ref>{{cite web |title=Definit ...

...entionally refers to the amplitude of the [[Sound#Sound Pressure Level|air pressure]] in the wave, but sometimes the amplitude of the [[Particle displacement|d *[[Atmospheric temperature#Temperature range|Atmospheric thermal amplitude]] ...

...gov/mgg/global/etopo1_ocean_volumes.html |publisher=[[National Oceanic and Atmospheric Administration|NOAA]] |access-date=2015-03-07 |url-status=bot: unknown |arc ...is called [[hydrogeology]]. If an impermeable layer overlies the aquifer, pressure could cause it to become a confined aquifer. ...

...of the LOX ([[liquid oxygen]]) was higher than that of the kerosene, extra pressure was available with the LOX, so it would have been used to cool the engine's ...m in atmosphere. This could be alleviated using makeup gas to develop base pressure, requiring an additional rocket engine to fill up the base of the main rock ...

...ectric transducer that generates an electric potential when subjected to a pressure change, such as a sound wave. ...4.3 times faster in water than in air, and a sound wave in water exerts a pressure 60 times that exerted by a wave of the same amplitude in air. Similarly, a ...