In order to find time, the astronaut orbiting in an earth satellite should use

Options :
  1. A pendulum clock
  2. a watch having main spring to keep it going
  3. both are possible
  4. none of the above

Answer and Explanation :-

Answer: Option 2


In pendulum clock the time period depends on the value of g, while in spring watch the time period is independent of the value of g.

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