Ad Hoc Hint #3

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Across
  1. 2. Martial Art taught in "The Karate Kid"
  2. 4. Niccolo?
  3. 7. Book by RJ Palacio
  4. 8. What 1/(x²)does as it goes to infinity
  5. 11. Superhero alias without E
  6. 13. Home of the gators
  7. 16. Song by Ed Sheeran (2 words)
  8. 17. ????
  9. 18. German Children
  10. 20. Entropy
Down
  1. 1. The Lady from Donkey Kong
  2. 3. Pen apple pen
  3. 5. What happened?
  4. 6. Greek Demigod
  5. 9. Last element
  6. 10. Let's go in Spanish
  7. 12. _____ time
  8. 14. 2nd Dolphin from the famous movie
  9. 15. mass x acceleration
  10. 16. connection between appendages
  11. 19. Conscious self worth