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The main properties of cosmic ray particles are

  • A.Its electric charge
  • B.Its rest mass
  • C.Its energy
  • D.All of these are its properties

Answer: D

All three are properties of cosmic ray particles. They are mostly protons and heavier nuclei, so they carry an electric charge; each has a rest mass; and they arrive with enormous energy, typically 10&sup8; to 10²0; electron volts.

Since every listed property applies, the combined choice is correct.

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