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Sputnik 1, the first satellite launched into space by the Russians in 1957, is a 2-shel…
Sputnik 1, the first satellite launched into space by the Russians in 1957, is a 2-shel aluminum alloy (2024-T6) sphere. The highly polished outer shell (seeing deep space) is 585 mm in diameter, and has thickness of 1 mm (ID 583 mm). The inside shell is 2 mm thick. There is a contact resistance between the two shells of value Ric 100 m2 K/W Inside the shell, there is a radio unit that is uniformly dissipating thermal energy of Ignore the effects of the antennas. Hint: You can use a radiation heat transfer coefficient hr = εσ Qadio = 1 W Inner Shell Tsur = 0 K
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