Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/mountains/tsld027.htm
Дата изменения: Wed Mar 17 04:29:32 2004
Дата индексирования: Tue Oct 2 17:07:33 2012
Кодировка:
Поисковые слова: earth

<b style="color:black;background-color:#ffff66">Earth</b>

Earth

k=1.38x10-23J/K

G=6.67x10-11Nm2kg-2

M=5.97x1024kg

T=300K

r=6.4x106m

So the minimum mass is 1.0x10-26kg

This is more than the mass of a hydrogen atom (1.67x10-27kg) or a helium atom (4 times larger), so they will escape into space. Oxygen, nitrogen and carbon dioxide, however, are over this minimum mass and hence will stay around.

Previous slide Next slide Back to first slide View graphic version