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  1. H

    Multiple Choice

    then he be one retarded student i'm afraid
  2. H

    Multiple Choice

    A cannot be the answer. The formula v = rt(Gm/r) only applies for orbital velocity. When the probe's speed is halved, it is no longer an orbital velocity hence using that formula to deduce an increase in radius is invalid. Whether the answer is C or D, I can't say for sure.
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