The highest-energy cosmic rays detected on Earth have energies comparable to
A) the most energetic radio photons.
B) a car traveling at 60 miles per hour.
C) a baseball thrown by a major league pitcher.
D) a supernova.

Question

Quizplus · Accepted Answer

The highest-energy cosmic rays have energies comparable to a baseball thrown by a major league pitcher, which is significantly higher than typical photon energies but much lower than the energy released in a supernova.

The Highest-Energy Cosmic Rays Detected on Earth Have Energies Comparable