Distant dark mountains appear bluish because
A) they are far away.
B) yellow is being scattered.
C) you're looking at low-level blue sky between you and the mountain.
D) of nature's wonderful preferences.
Answer: C
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Compared to the energy put into a laser, the energy of the laser beam is
A) usually much more. B) much less. C) the same. D) none of the above
Order these cosmological events in order from earliest to latest.
A) formation of the first atomic nuclei, formation of the first neutral atoms, formation of the first subatomic particles, formation of the first galaxies B) formation of the first subatomic particles, formation of the first atomic nuclei, formation of the first neutral atoms, formation of the first galaxies C) formation of the first galaxies, formation of the first neutral atoms, formation of the first atomic nuclei, formation of the first subatomic particles D) formation of the first subatomic particles, formation of the first neutral atoms, formation of the first atomic nuclei, formation of the first galaxies E) formation of the first neutral atoms, formation of the first subatomic particles, formation of the first atomic nuclei, formation of the first galaxies F) formation of the first atomic nuclei, formation of the first subatomic particles, formation of the first neutral atoms, formation of the first galaxies
Both Pluto and Charon are tidally locked to always keep the same faces toward each other, rotating and revolving around their common center of mass every 14.2 hours
Indicate whether the statement is true or false
Which spacecraft did NOT visit Saturn?
A. Pioneer B. Voyager 2 C. mariner 10 D. Galileo