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

Author Question: Sgr A is believed to be the center of the Milky Way galaxy because I. it lies in the general ... (Read 43 times)

Zulu123

  • Hero Member
  • *****
  • Posts: 525
on: Jul 27, 2018
Sgr A is believed to be the center of the Milky Way galaxy because I. it lies in the general direction of the center of the galaxy based on observations of globular clusters in the plane of the Milky Way. II. long-wavelength dust-penetrating images show it to be a region crowded with stars. III. orbits of stars around it indicate a mass several million times that of the Sun within a volume a few light hours in size. IV. radio observations show it is a concentrated source at the center of swirling clouds of gas.
 
  a. I & II only
  b. II & III only
  c. I & IV only
  d. II & IV only
  e. All of I, II, III, & IV

Question 2

The average star spends ________ of its lifetime on the main sequence.
 
  a. 1
  b. 2
  c. 10
  d. 20
  e. 90


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

potomatos

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Jul 27, 2018
Answer to Question 1

e

Answer to Question 2

e


Zulu123

  • Hero Member
  • *****
  • Posts: 525
Reply #2 on: Jul 27, 2018
Thank you!


potomatos

  • Sr. Member
  • ****
  • Posts: 338
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

General structure of an amino acid General structure of an amino acid
To keep the foot under the center of gravity, the biped’s femur is angled from hip to knee. The quad To keep the foot under the center of gravity, the biped’s femur is angled from hip to knee. The quad
The IAT sensor on this General Motors 3800 V-6 engine is in the air passage duct between the air ... The IAT sensor on this General Motors 3800 V-6 engine is in the air passage duct between the air ...
A General Motors linear EGR Valve. A General Motors linear EGR Valve.
The general description of allele and genotype frequencies under Hardy–Weinberg assumptions The general description of allele and genotype frequencies under Hardy–Weinberg assumptions
General strategies of forward and reverse genetics General strategies of forward and reverse genetics
Video: Pressure volume relationships - Normal inspiration and expiration

For a complete list of videos, visit our video library