“2016年IOAA理论第2题-土卫六上的气体”的版本间的差异
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Gas particles in a planetary atmosphere have a wide distribution of speeds. If the r.m.s. (root mean square) | Gas particles in a planetary atmosphere have a wide distribution of speeds. If the r.m.s. (root mean square) | ||
thermal speed of particles of a particular gas exceeds 1/6 of the escape speed, then most of that gas will | thermal speed of particles of a particular gas exceeds 1/6 of the escape speed, then most of that gas will | ||
| − | escape from the planet. What is the minimum atomic weight (relative atomic mass), | + | escape from the planet. What is the minimum atomic weight (relative atomic mass), 𝐴<sub>min</sub>, of an ideal |
monatomic gas so that it remains in the atmosphere of Titan? | monatomic gas so that it remains in the atmosphere of Titan? | ||
Given, mass of Titan 𝑀<sub>T</sub> = 1.23 × 10<sup>23</sup> kg, radius of Titan 𝑅<sub>T</sub> = 2575 km, surface temperature of | Given, mass of Titan 𝑀<sub>T</sub> = 1.23 × 10<sup>23</sup> kg, radius of Titan 𝑅<sub>T</sub> = 2575 km, surface temperature of | ||
Titan 𝑇<sub>T</sub> = 93.7 K. | Titan 𝑇<sub>T</sub> = 93.7 K. | ||
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| + | [[分类:热学]] | ||
2019年9月11日 (三) 17:24的版本
英文题目
(T2) Gases on Titan
Gas particles in a planetary atmosphere have a wide distribution of speeds. If the r.m.s. (root mean square) thermal speed of particles of a particular gas exceeds 1/6 of the escape speed, then most of that gas will escape from the planet. What is the minimum atomic weight (relative atomic mass), 𝐴min, of an ideal monatomic gas so that it remains in the atmosphere of Titan?
Given, mass of Titan 𝑀T = 1.23 × 1023 kg, radius of Titan 𝑅T = 2575 km, surface temperature of Titan 𝑇T = 93.7 K.
