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John Davies's user avatar
John Davies's user avatar
John Davies's user avatar
John Davies
  • Member for 5 years, 5 months
  • Last seen more than 3 years ago
  • Manchester, UK
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2021 Community Moderator Election Results
Apr 30, 2021
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6
What is the Inner Horizon of a rotating black hole?
6
Equation for Velocity and distance from Sun of a solar sail powered spacecraft