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Ultra-High-Energy Cosmic Rays and Their Origin

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Multiple Choice

What is the approximate energy range of Ultra-High-Energy Cosmic Rays (UHECRs)?

  1. 10^12 eV to 10^15 eV
  2. 10^15 eV to 10^19 eV
  3. 10^19 eV to 10^23 eV
  4. 10^23 eV and above