« previous next »

Author Question: In a visual binary system with circular orbits, if in 20 years the two stars' position angles have ... (Read 101 times)

OSWALD

  • Hero Member
  • *****
  • Posts: 580
on: Jul 27, 2018
In a visual binary system with circular orbits, if in 20 years the two stars' position angles have shifted by 30 degrees, the pair's period must be
 
  A) 60 years.
  B) 90 years.
  C) 120 years.
  D) 240 years.
  E) 360 years.

Question 2

The habitable zone is largest for:
 
  A) brown dwarfs.
  B) red dwarfs.
  C) white dwarfs.
  D) red giants.
  E) blue giants.


Liamb2179

  • Sr. Member
  • ****
  • Posts: 365
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

E


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

A child having a seizure is gently assisted to the floor and placed in a sidelying position. A child having a seizure is gently assisted to the floor and placed in a sidelying position.
The Rodent Accessory Olfactory System The Rodent Accessory Olfactory System
Structures of the respiratory system. Structures of the respiratory system.
Procedures and Diagnostic Tests Related to the Endocrine System Procedures and Diagnostic Tests Related to the Endocrine System
Procedures and Diagnostic Tests Related to the Female Reproductive System Procedures and Diagnostic Tests Related to the Female Reproductive System
The respiratory system and the process of gas exchange The respiratory system and the process of gas exchange
Video: Hormonal feedback loop components & Glucagon (glycogenolysis and gluconeogenesis)

For a complete list of videos, visit our video library