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 176 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?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

(A) Figure illustrating the location and appearance of a peptic ulcer in both the stomach and the du (A) Figure illustrating the location and appearance of a peptic ulcer in both the stomach and the du
Uranus revolves around the Sun once every 84 Earth years. Its average distance from the Sun is rough Uranus revolves around the Sun once every 84 Earth years. Its average distance from the Sun is rough
Four cutaneous receptors that occur in human skin. Four cutaneous receptors that occur in human skin.
Location of thyroid gland. Location of thyroid gland.
Three mechanics worked 15 1/2, 14 3/4, 18 1/8 hours respectively. What was the total Three mechanics worked 15 1/2, 14 3/4, 18 1/8 hours respectively. What was the total
A genetic map showing the location of revertible (point) mutants of the rll region A genetic map showing the location of revertible (point) mutants of the rll region
Video: Amniocentesis and CVS Animation

For a complete list of videos, visit our video library