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Number of Results: 36 Search : second

arc second kamân-sâniyé, sâniye-ye kamâni Fr.: seconde de degré A unit of angular size equal to 1/3.600 of a degree. |

Bohr's second postulate farâvas-e dovom-e Bohr Fr.: deuxième postulat de Bohr One of the postulates used in the → |

ephemeris second sâniye-ye ruziji Fr.: seconde des éphémérides The length of a tropical second (1/31,556,925.97474 of the tropical
year) on 1900 January 0.5 → |

Kepler's second law qânun-e dovom-e Kepler (#) Fr.: deuxième loi de Kepler A line joining a planet to the Sun sweeps out equal areas in equal intervals of time. |

leap second sâniyeh-ye andarheli Fr.: seconde intercalaire A one-second added between 60s and 0s at announced times to keep the Coordinated Universal Time (UTC), counted by atomic clocks, within 0s.90 of mean solar time (UT1). Generally, leap seconds are added at the end of June or December. |

light-second nur-sâniyé, sâniye-ye nuri Fr.: second-lumière The distance travelled by light in free space in one second. It is equivalent to
2.997924580 × 10 |

millisecond pulsar pulsâr-e milisâniyé (#), tapâr-e ~ (#) Fr.: pulsar milliseconde A type of pulsar that spins around its axis every few thousands of a
second. The prototype 1937+21, discovered in 1982, has a period of
1.56 milliseconds; i.e. it spins more than 600 times per second, the
fastest so far found (Backer et al. 1982, Nature 300, 615).
These pulsars are distinguished from typical
pulsars by the extreme stability of their rotation period.
It is thought that they have been rejuvenated by a "spin-up process"
involving the accumulation of matter from a companion star.
→ |

Newton's second law of motion dovomin qânun-e Newtoni-ye jonbeš (#) Fr.: seconde loi newtonienne de mouvement For an unbalanced force acting on a body, the acceleration produced is proportional to the force impressed; the constant of proportionality is the inertial mass of the body. |

second 1) dovom (#), dovomin (#); 2) sâniyé (#) Fr.: seconde 1) Next after the first in place, time, or value. M.E., from O.Fr. az from;
Mid.Pers. hac "from;"
Av. hac-, hax- "to follow," hacaiti "follows"
(O.Pers. hacā "from;" Av. hacā "from, out of;"
Skt. sácā "with"); Skt. sácate
"accompanies, follows;" Gk. hepesthai "to follow;"
Lith. seku "to follow."1) |

second approximation nazdineš-e dovom Fr.: deuxième approximation
linear approximation.
→ first approximation.→ |

second collapse rombeš-e dovom Fr.: deuxième effondrement An early evolutionary period in the process of star formation which
succeeds the → ^{10} cm (1.3 R) respectively, and the central
density and temperature are about 2 x 10_{sun}^{-2}
g cm^{-3} and 2 x 10^{4} K, respectively.
The second core will evolve into a → young stellar object
(R. B. Larson, 1969, MNRAS 145, 271). |

second contact parmâs-e dovom Fr.: deuxième contact The beginning of the total phase of a solar eclipse when the leading edge of the Moon touches the eastern edge of the Sun completely obscuring the Sun. |

second core maqze-ye dovom Fr.: deuxième cœur A hydrostatic object predicted to result from the
→ |

second derivative vâxane-ye dovom Fr.: dérivée seconde In → → |

second derivative test âzmun-e vâxane-ye dovom Fr.: test de la dérivée seconde A method, used in → → |

second dredge-up borunkašid-e dovom Fr.: deuxième dragage A → |

second generation star setâre-ye âzâneš-e dovom Fr.: étoile de deuxième génération A star whose formation is induced by an older star itself formed previously
in the same region. See also → → |

second law of black-hole mechanics qânun-e dovom-e mekânik-e siyah-câl Fr.: deuxième loi de la mécanique des trous noirs The surface area of a black hole's horizon can never decrease. → |

second law of thermodynamics qânun-e dovom-e garmâtavânik Fr.: deuxième loi de la thermodynamique 1) Heat cannot be transferred from a colder to a hotter body without some other effect, i.e.
without → → |

second quantization kuântomeš-e dovom Fr.: deuxième quantification In quantum mechanics, the quantization of the field that replaces potential in Newtonian mechanics, whereby the field variables become operators from which the creation (of particle) operators and destruction operators can be constructed. → |