| 词汇 | escape-velocity |
| 释义 | escape velocity noun[ C ] uk /ɪˈskeɪp vəˌlɒs.ə.ti/ us /ɪˈskeɪp vəˌlɑː.sə.t̬i/ the speed at which an object such as a spacecraft must travel in order to escape from the gravity(= the force that makes things fall to the ground) of the Earth or of another planet, moon, etc.: Escape velocity depends on the size and density of the planet or celestial body concerned. The planets in our solar system have different masses and so their escape velocities are also different. Related word velocity Earth's escape velocity is 11.2 km per second. The moon's escape velocity is much lower than Earth's, because it is smaller and less dense. Jupiter is a huge planet, and its escape velocity is correspondingly high. The size of a black hole is determined by its escape velocity. Speed of motion at full/half throttleidiom briskness burst of speed celerity clip clock ground speed hypersonic hypervelocity instantaneous velocity light speed linear velocity momentum pace speed of sound speediness supersonically swiftness throttle velocity You can also find related words, phrases, and synonyms in the topics: Space travel |
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