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

Author Question: Which of these is NOT a source of the shock waves that lead to protostars? A) radiation from the ... (Read 37 times)

misspop

  • Hero Member
  • *****
  • Posts: 540
on: Jul 27, 2018
Which of these is NOT a source of the shock waves that lead to protostars?
 
  A) radiation from the OB stars in emission nebulae
  B) expanding Herbig-Haro objects
  C) expanding planetary nebula shells
  D) violent supernovae explosions
  E) collisions between galaxies

Question 2

Relate the temperature of the Big Bang to pair production in the quark and lepton epochs.
 
  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

polinasid

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

The higher the temperature, the greater the energy of the colliding photons, and the heavier the particle-antiparticle pairs created; hence heavier protons and neutrons formed in the quark epoch before the lighter electrons in the lepton epoch.


misspop

  • Member
  • Posts: 540
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

dantucker

  • Member
  • Posts: 346
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

Green tea is able to stop the scent of garlic or onion from causing bad breath.

Experimental Evidence for Infrared Radiation Experimental Evidence for Infrared Radiation
Binary Head-Tail Source Binary Head-Tail Source
This 1900 photograph of steel factories at night in Duquesne, near Pittsburgh, was tinted by hand. S This 1900 photograph of steel factories at night in Duquesne, near Pittsburgh, was tinted by hand. S
Radiation Side Effects, Healing Time, and Intervention Radiation Side Effects, Healing Time, and Intervention
Radiation Radiation
Milk is essential source of calcium Milk is essential source of calcium
Video: Bond types - Atomic structure and basis of bonds

For a complete list of videos, visit our video library