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

Author Question: During the eighteenth and nineteenth centuries, attempts to precisely measure the astronomical unit ... (Read 91 times)

serike

  • Hero Member
  • *****
  • Posts: 542
on: Jul 27, 2018
During the eighteenth and nineteenth centuries, attempts to precisely measure the astronomical unit relied largely on rare
 
  A) total solar eclipses.
  B) transits of the inferior planets across the Sun.
  C) passages of comets close to the Earth.
  D) maximum elongations of Venus.
  E) oppositions of Mars.

Question 2

Most interstellar clouds remain stable in size because the force of gravity is opposed by ________ within the cloud.
 
  A) degeneracy pressure
  B) radiation pressure
  C) stellar winds
  D) thermal pressure


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mcomstock09

  • Sr. Member
  • ****
  • Posts: 377
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

D


serike

  • Hero Member
  • *****
  • Posts: 542
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


mcomstock09

  • Sr. Member
  • ****
  • Posts: 377
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Wang Guochen, c. nineteenth century Wang Guochen, c. nineteenth century
A Motor Unit A Motor Unit
A functional renal unit. A functional renal unit.
A typical oil pressure sending unit on a Ford V-8. A typical oil pressure sending unit on a Ford V-8.
Biosynthesis of the repeating oligosaccharide unit of the O antigen of Salmonella typhimurium Biosynthesis of the repeating oligosaccharide unit of the O antigen of Salmonella typhimurium
Climate Change: Timescale decades to centuries Climate Change: Timescale decades to centuries
Video: Elementary kinetics

For a complete list of videos, visit our video library