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 261 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
YES! Correct, THANKS for helping me on my review

tandmlomax84

  • Member
  • Posts: 323
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

A copper-striped blue-tailed skink (Emoia impar) A copper-striped blue-tailed skink (Emoia impar)
Cultured HeLa cells have been stained with Hoechst turning their nuclei blue Cultured HeLa cells have been stained with Hoechst turning their nuclei blue
Aerial view of a blue whale showing both pectoral fins Aerial view of a blue whale showing both pectoral fins
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
Shooting star Shooting star
Planets and Their Stars Planets and Their Stars
Video: Dissociative Disorders (Part 3)

For a complete list of videos, visit our video library