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7 votes

Why is the expansion ratio of the nozzle of the 2nd stage larger than the expansion ratio of the nozzle of the 1st stage of a rocket?

Neither explanation is exactly correct. Why Is the expansion ratio of the nozzle of the 2nd stage larger than the expansion ratio of the nozzle of the 1st stage of a rocket? Because it provides ...
A McKelvy's user avatar
  • 2,492
2 votes

Pool on the Moon?

Answer: Not long to live. Assuming he is not hypothermic, he will be unconscious in about a minute and brain dead in 4 minutes. The hydrostatic pressure at 3m pool depth under Moon gravity is 35mmHg. ...
Woody's user avatar
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1 vote

Are artificial satellites completely sealed or open to space?

The very first artificial satellite Sputnik 1 was pressurized. There was a barometric switch to check the pressure, a pressure loss would indicate a hit by a micrometeorite puncturing the hull. The ...
Uwe's user avatar
  • 49k
1 vote

Decay of a corpse in space?

Answer: It depends. You need to specify the situation. Dr. Frank Poole found himself in a depressurize spacesuit, in a frigid orbit around Jupiter back in 2001. He likely froze solid before gut ...
Woody's user avatar
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