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

Author Question: Where did the cosmic microwave background (CMB) come from? a. photons emitted from the first ... (Read 64 times)

jwb375

  • Hero Member
  • *****
  • Posts: 540
on: Jul 27, 2018
Where did the cosmic microwave background (CMB) come from?
 
  a. photons emitted from the first stars
  b. photons released from hydrogen in our galaxy
  c. light scattered by dust in our Solar System
  d. photons released when electrons and nuclei combined for the first time

Question 2

Why do supernova remnants have limited lifetimes?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Liddy

  • Sr. Member
  • ****
  • Posts: 342
Reply #1 on: Jul 27, 2018
Answer to Question 1

d

Answer to Question 2

They gradually mix with the interstellar medium and vanish.


jwb375

  • Member
  • Posts: 540
Reply 2 on: Jul 27, 2018
Wow, this really help

nyrave

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Image of a blue whale's tail fluke with the Santa Barbara Channel Islands in the background, Au Image of a blue whale's tail fluke with the Santa Barbara Channel Islands in the background, Au
Science Background Science Background
A microwave telescope “sees” microwave light coming from all directions in the sky… A microwave telescope “sees” microwave light coming from all directions in the sky…
The Cosmic Calendar: Concepts of Time The Cosmic Calendar: Concepts of Time
Video: Atrophy

For a complete list of videos, visit our video library