This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Twelve hours of daytime and twelve hours of nighttime occur at every location on Earth whenever the ... (Read 141 times)

bclement10

  • Hero Member
  • *****
  • Posts: 560
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.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

lkanara2

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

c


bclement10

  • Hero Member
  • *****
  • Posts: 560
Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


lkanara2

  • Sr. Member
  • ****
  • Posts: 329
Reply #3 on: Jul 28, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

6-8 Earth’s Major Tectonic Plates 6-8 Earth’s Major Tectonic Plates
Valmeyer’s New Location Valmeyer’s New Location
The Atmosphere Screens Earth from Harmful Solar Radiation The Atmosphere Screens Earth from Harmful Solar Radiation
The Location and Number of Food- and Beverage-Processing Facilities The Location and Number of Food- and Beverage-Processing Facilities
Earth-Moon-Sun Positions during the Neap Tide Earth-Moon-Sun Positions during the Neap Tide
Humans are related to Earth’s other organisms Humans are related to Earth’s other organisms
Video: Conduction of action potentials

For a complete list of videos, visit our video library