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Author Question: Twelve hours of daytime and twelve hours of nighttime occur at every location on Earth whenever the ... (Read 201 times)

bclement10

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on: Jul 28, 2018
Twelve hours of daytime and twelve hours of nighttime occur at every location on Earth whenever the Sun reaches the
 a. north or south celestial pole.
  b. celestial prime meridian.
  c. vernal or autumnal equinox.
  d. ecliptic.

Question 2

Niels Bohr focused his attention on the element hydrogen because it
 a. could be obtained in extremely high purity.
  b. was so abundant.
  c. had the simplest atom.
  d. was inexpensive.


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lkanara2

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Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

c


bclement10

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


lkanara2

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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