- 04/18/2019 at 12:45 am #516434EduGorillaKeymasterSelect Question Language :
Which of the following statements is/are correct?
1. Launching heavy satellites, weighing over 2 tons, into geostationary orbit requires an upper stage powered by a cryogenic engine.
2. Cryogenic technology involves the use of liquid oxygen at minus 183 degree Celsius and liquid hydrogen at minus 253 degree Celsius.
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