« previous next »

Author Question: A star more massive than the Sun will have A) an identical lifetime as the Sun because although ... (Read 36 times)

mmm

  • Hero Member
  • *****
  • Posts: 558
on: Jul 27, 2018
A star more massive than the Sun will have
 
  A) an identical lifetime as the Sun because although its overall mass is higher, the mass of its nuclear burning core is the same
  B) a longer lifetime because it has more fuel to burn
  C) a shorter lifetime because although its overall mass is higher, the mass of its nuclear burning core is smaller
  D) a shorter lifetime because its central core is hotter and denser

Question 2

Why do the oldest stars we observe contain almost nothing but hydrogen and helium?
 
  What will be an ideal response?


tofugiraffe

  • Sr. Member
  • ****
  • Posts: 319
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

This first generation of stars must be made of the elements produced in primordial nucleosynthesis, which had time only to turn 25 of the hydrogen into helium.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

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

Proportions of the genetic and physical maps are similar but not identical Proportions of the genetic and physical maps are similar but not identical
Betelgeuse star (Hubble) Betelgeuse star (Hubble)
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Radial and Transverse Velocities of a Star Radial and Transverse Velocities of a Star
Identical twins share 100 percent of their segregating genes. Identical twins share 100 percent of their segregating genes.
1.6 Organisms are made up of cells, each of which contains an identical set of genes. 1.6 Organisms are made up of cells, each of which contains an identical set of genes.
Video: Arthritis

For a complete list of videos, visit our video library