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Number of Results: 41 Search : scale

Beaufort scale marpel-e Beaufort Fr.: échelle de Beaufort A system for estimating and reporting wind speeds which has 13 standardized categories
and associated descriptions. The Beaufort scale ranges from 0 for complete calm to 12
for a cyclone. In this scale, the wind speed (in km/h) equals B is the
Beaufort number of the wind. The scale was originally devised for use at sea but
has subsequently been modified for use over land.Named after Admiral Sir Francis Beaufort (1774-1857), who introduced the first
version of the system in 1805; → |

Celsius scale marpel-e Celsiu Fr.: échelle de Celsius The official name of the centigrade temperature scale with the
→ In honor of Anders Celsius (1701-1744), Swedish astronomer, originator
of the first centigrade temperature scale. However, in his original
scale Celsius had 100° for the ice point and 0° for the steam point;
→ |

cosmic distance scale marpel-e durâ-ye keyhâni Fr.: échelle des distances cosmiques Measurement of the distances to the farthest objects in the Universe based on a bootstrapping series of methods, each applicable to more distant objects, and each dependent on the previous methods. |

cosmic scale factor karvand-e marpal-e keyhâni Fr.: facteur d'échelle cosmologique A quantity, denoted |

Danjon scale marpel-e danjon Fr.: échelle de Danjon A scale to evaluate as exactly as possible the darkening degree of a
total → Named after André Danjon, who set up the scale,
→ |

dynamical time scale marpel-e zamâni-ye tavânik Fr.: échelle de temps dynamique 1) The characteristic time it takes a protostellar cloud to collapse
if the pressure supporting it against gravity were suddenly removed;
also known as the → → |

Eddington-Sweet time scale marpel-e zamâni-ye Eddington-Sweet Fr.: échelle de temps d'Eddington-Sweet The time required for the redistribution of → τ is the
→ _{KH}Kelvin-Helmholtz time scale,
R, M, and L designate the radius, mass, and luminosity respectively,
Ω the → angular velocity, and G the
→ gravitational constant.
The Eddington-Sweet time scale can be approximated by
τ,
where χ is the ratio of the → _{ES}≅ τ_{KH} / χcentrifugal force to
→ gravity. For the Sun,
χ ≅ 10^{-5} resulting in an Eddington-Sweet time scale which
is too long (10^{12} years), i.e. unimportant. In contrast, for a
rotating → massive star χ is not so much less than 1. Hence
the Eddington-Sweet circulation is very important in massive stars.Named after the prominent British astrophysicist Arthur S. Eddington (1882-1944), who
was the first to suggest these currents (in |

Einstein time-scale marpel-e zamâni-ye Einstein Fr.: échelle de temps d'Einstein The time during which a → → |

evolutionary time scale zamân-marpel-e fargašt Fr.: échelle de temps d'évolution The characteristic time it takes an evolving astronomical object to pass from a step to another. → |

Fahrenheit scale marpel-e Fahrenhait Fr.: échelle de Fahrenheit A temperature scale (°F) in which the → Developed by the German physicist Gabriel Fahrenheit (1686-1736);
→ |

galactic-scale outflow ostacân bâ marpel-e kahkešâni Fr.: flot à l'échelle galactique The enormous amounts of → |

image scale marpel-e tasvir Fr.: échelle de l'image The quantity that relates the length on the image to the angular or physical separations on the sky. |

Jeans scale marpel-e Jeans Fr.: échelle de Jeans Same as → |

Kardashev scale marpel-e Kardashev Fr.: échelle de Kardashev A way of measuring a civilization's technological advancement based
upon how much usable energy it has at its disposal.
The scale was originally designed in 1964 by the Russian astrophysicist
Nikolai Kardashev (who was looking for signs of extraterrestrial life
within cosmic signals). It has three base classes, each with an energy
disposal level: Type I, Type II, and Type III.
Type I designates a civilization that is capable of controlling the total energy of
its home planet (10 The scale was originally designed in 1964 by the Russian astrophysicist
Nikolai Kardashev (1932-); → |

Kelvin scale marpel-e Kelvin Fr.: échelle de Kelvin A temperature scale, redefined in 1954, in which the zero point is equivalent to
-273.16 °C. This fundamental fixed point, based on
the → → |

Kolmogorov scale marpel-e Kolmogorov Fr.: échelle de Kolmogorov Length scale of → → |

large scale bozorg-marpel Fr.: grande échelle 1) A scale representing measures that significantly override the usual ones of
the same kind. |

large-scale structure sâxtâr-e bozorg-marpel Fr.: structure à grandes échelles The distribution of galaxies and other forms of mass on large distance
scales, covering hundreds of millions of → |

logarithmic scale marpel-e logâritmi Fr.: échelle logarithmique A scale of measurement in which an increase of one unit represents a tenfold increase in the quantity measured (for common logarithms) → |

magnitude scale marpel-e borzhâ Fr.: échelle de magnitudes A scale for measuring and comparing the brightness of astronomical objects. |