escape speed

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03:18 Sep 23, 2008
English to Chinese translations [PRO]
Science - Astronomy & Space
Additional field(s): Aerospace / Aviation / Space, Physics
English term or phrase: escape speed
Definition from physics.fortlewis.edu:
The speed necessary for an object to escape the gravitational pull of an object. Anything that moves away from the object with more than the escape speed will never return.

Example sentence(s):
  • When an object is traveling exactly at escape speed, it is in a parabolic orbit with the body at the focus of the parabola. A parabolic path is open; hence an object following such a path will never return to the body. Conservapedia
  • Black holes, having infinite density, have an infinitely large escape speed. But it turns out that the escape speed value depends on how far an object is from a body of mass. So there is a certain distance from a black hole where the escape speed just equals the speed of light. Are black holes real?
  • One somewhat counterintuitive feature of escape velocity is that it is independent of direction, so that "velocity" is a misnomer; it is a scalar quantity and would more accurately be called "escape speed". Space Wiki
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Summary of translations provided
5 +1脫離速度/第二宇宙速度
Gertrude Tsau
5逃脫速度
SShao


  

Translations offered


37 days   confidence: Answerer confidence 5/5 peer agreement (net): +1
脫離速度/第二宇宙速度


Definition from Wikipedia:
脫離速度是指在地球上发射的物体摆脱地球引力束缚,飞离地球所需的最小初始速度。

Example sentence(s):
  • 第一宇宙速度又称为环绕速度,是指在地球上发射的物体绕地球飞行作圆周运动所需的最小初始速度。 第二宇宙速度又称为脱离速度,是指在地球上发射的物体摆脱地球引力束缚,飞离地球所需的最小初始速度。 第三宇宙速度又称为逃逸速度,是指在地球上发射的物体摆脱太阳引力束缚,飞出太阳系所需的最小初始速度。 第四宇宙速度是指在地球上发射的物体摆脱银河系引力束缚,飞出银河系 所需的最小初始速度。 - Wikipedia  
  • 某星球的密度為地球的2倍、半徑為地球的2倍,則自該星球發射火箭所需的脫離速度,應為自地球發射時脫離速度的若干倍? - 中學物理科試題  
  • 黑洞的定義是物質脫離速度大於光速的區域。 - 科學發展  
Gertrude Tsau
United States
Local time: 02:04
Native speaker of: Chinese
PRO pts in category: 4

Votes in favor of/against selecting this as the best translation of the term asked
Yes  orientalhorizon: 在大陆,物理学教科书上称之为“逃逸速度”。
37 mins
  -> 謝謝!以前我也這樣用過,現在逃逸速度是指第三宇宙速度.
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98 days   confidence: Answerer confidence 5/5
逃脫速度


Definition from own experience or research:
逃脫速度是一個物體得以逃脫另一個物體的引力作用所必須的速度。任何物體,以高於逃脫速度離開該另一物體,將永不再返回。

Example sentence(s):
  • 在此高溫之下,粒子速度以麦克斯韦-玻尔兹曼分布(Boltzmann)形式分佈,在尾部的粒子速度高於行星的逃脫速度。該行星每秒估計正散失1-5億公斤的氫氣,其氫尾長度可達20萬公里。 - Wikipedia  

Explanation:
按照英文的escape speed的定義,該速度是指對任何物體而言,並不限於地球或銀河。故應採用一個有別于已用於地球和銀河的術語。在所引用的例句中,有人已在Wikipedia上用逃脫速度。
SShao
Local time: 00:04
Native speaker of: Native in ChineseChinese
Notes to answerer
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