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

Author Question: The key point to remember when considering the Hertzsprung-Russell (H-R) diagram of a star cluster ... (Read 23 times)

madam-professor

  • Hero Member
  • *****
  • Posts: 584
on: Jul 27, 2018
The key point to remember when considering the Hertzsprung-Russell (H-R) diagram of a star cluster in determining the evolution of stars is that all of the stars in the star cluster have the same:
 
  A) temperature but differ in luminosity.
  B) age but differ in mass.
  C) size but differ in composition.
  D) shape but differ in transparency.

Question 2

A star remains on the main sequence for a time span equal to _____ of its total existence as an energy-generating star.
 
  A) 90 percent
  B) 40 percent
  C) 15 percent
  D) 55 percent


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jazzlynnnnn

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

A


madam-professor

  • Member
  • Posts: 584
Reply 2 on: Jul 27, 2018
Gracias!

Perkypinki

  • Member
  • Posts: 339
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star
Monosaccharides Diagram Monosaccharides Diagram
Schematic diagram of fluidization apparatus Schematic diagram of fluidization apparatus
The energy set-point view that is the basis of many people’s thinking about hunger and eating. The energy set-point view that is the basis of many people’s thinking about hunger and eating.
Dew-Point Thresholds Dew-Point Thresholds
Finger pressure to a trigger point. Finger pressure to a trigger point.
Video: Introduction to Breast Cancer

For a complete list of videos, visit our video library