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

Author Question: Suppose you see two stars: a blue star and a red star. Which of the following can you conclude about ... (Read 191 times)

09madisonrousseau09

  • Hero Member
  • *****
  • Posts: 559
on: Jul 27, 2018
Suppose you see two stars: a blue star and a red star. Which of the following can you conclude about the two stars? Assume that no Doppler shifts are involved. (Hint: Think about the laws of thermal radiation.)
 
  A) The red star is more massive than the blue star.
  B) The blue star is more massive than the red star.
  C) The blue star is farther away than the red star.
  D) The blue star has a hotter surface temperature than the red star.
  E) The red star has a hotter surface temperature than the blue star.

Question 2

According to general relativity, what is a black hole?
 
  A) an object that cannot be seen
  B) a place where light travels slower than the normal speed of light
  C) a place where the strength of gravity is infinite
  D) a hole in the observable universe


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

vickyvicksss

  • Sr. Member
  • ****
  • Posts: 351
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

D


09madisonrousseau09

  • Member
  • Posts: 559
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

alexanderhamilton

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

The Sun is the nearest star to Earth. The Sun is the nearest star to Earth.
Blue Cohosh Blue Cohosh
The Types of Stars and Their Sizes The Types of Stars and Their Sizes
John Marin, Untitled (The Blue Sea). John Marin, Untitled (The Blue Sea).
Brittle Star Brittle Star
Video: Optic Nerve and Optic Disk Animation (Part 2 of 2)

For a complete list of videos, visit our video library