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eigenrobot's profile
eigenrobot
eigenrobot
eigenrobot
@eigenrobot

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eigenrobot

@eigenrobot

robot. friend.

eigenrobot.substack.com
Joined July 2013

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    1. Fred Will Not Subscribe To Your Newsletter‏ @LesserFrederick 28 Feb 2017

      Yes, you can drop rocks on the Earth from the Moon at 11 km/s. You only have to launch them at 2.4 km/s from the Moon's surface.

      3 replies 0 retweets 1 like
    2. Fred Will Not Subscribe To Your Newsletter‏ @LesserFrederick 28 Feb 2017
      Replying to @LesserFrederick

      A 1-ton rock launched from the Moon at lunar escape velocity will hit the Earth with an energy of ~15 tons of TNT.

      1 reply 0 retweets 1 like
    3. Fred Will Not Subscribe To Your Newsletter‏ @LesserFrederick 28 Feb 2017
      Replying to @LesserFrederick

      It delivers about 4x the energy to the target as it takes to launch it. This is not an efficient weapon.

      1 reply 0 retweets 0 likes
    4. Fred Will Not Subscribe To Your Newsletter‏ @LesserFrederick 28 Feb 2017
      Replying to @LesserFrederick

      Refining 100kg of highly enriched uranium gives you a bomb 1000x as powerful.

      2 replies 0 retweets 0 likes
      eigenrobot‏ @eigenrobot 28 Feb 2017
      Replying to @LesserFrederick

      is the rate of energy return constant with rock scale? Eg will a 2 ton rock hit with force of ~30 tons TNT, or . . . (?)

      2:50 PM - 28 Feb 2017
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Fred Will Not Subscribe To Your Newsletter‏ @LesserFrederick 28 Feb 2017
          Replying to @eigenrobot

          Doesn't it have to be since the energy comes from Earth's gravity?

          2 replies 0 retweets 0 likes
        3. Fred Will Not Subscribe To Your Newsletter‏ @LesserFrederick 28 Feb 2017
          Replying to @LesserFrederick

          A smaller fraction of larger rocks will ablate in the atmosphere, but you're limited by the ratio of escape velocities.

          0 replies 0 retweets 1 like
        4. End of conversation

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