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 71 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
:D TYSM

ttt030911

  • Member
  • Posts: 315
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

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 first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Did you know?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Cosmic Ray Shower Cosmic Ray Shower
Spectrum of the Cosmic Microwave Background Spectrum of the Cosmic Microwave Background
Violating Background Assumptions Violating Background Assumptions
Science Background Science Background
What is the maximum velocity (in km/s) of a photoelectron emitted from a surface whose work ... What is the maximum velocity (in km/s) of a photoelectron emitted from a surface whose work ...
Video: Wound Repair Animation

For a complete list of videos, visit our video library