Primary cosmic rays are characteristic phenomena of the
A) solar system.
B) galaxy.
C) regions between the galaxies.
D) entire universe.
Correct Answer:
Verified
Q23: The most distant galaxies are receding at
Q24: The energy that reaches the earth in
Q25: Present evidence suggests that the universe
A) will
Q29: The proportionality between the recession speeds of
Q30: In a "closed" universe
A) expansion of the
Q32: The expansion of the universe apparently
A)has always
Q33: Quasars
A) are weak sources of light and
Q34: Galactic spectra show
A) red and blue shifts.
B)
Q39: Primary cosmic rays consist of
A) atomic nuclei,
Q40: Dark energy
A) is the energy equivalent of
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