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

Author Question: Observationally, how can we tell the difference between a white-dwarf supernova and a massive-star ... (Read 145 times)

P68T

  • Hero Member
  • *****
  • Posts: 509
on: Jul 27, 2018
Observationally, how can we tell the difference between a white-dwarf supernova and a massive-star supernova?
 
  A) A massive-star supernova is brighter than a white-dwarf supernova.
  B) A massive-star supernova happens only once, while a white-dwarf supernova can repeat periodically.
  C) The light of a white-dwarf supernova fades steadily, while the light of a massive-star supernova continues to brighten for many weeks.
  D) The spectrum of a massive-star supernova shows prominent hydrogen lines, while the spectrum of a white-dwarf supernova does not.
  E) We cannot yet tell the difference between a massive-star supernova and a white-dwarf supernova.

Question 2

What are the two geological features that appear to set Earth apart from all the other terrestrial worlds?
 
  A) a dense core and plate tectonics B) mantle convection and a thick atmosphere
  C) significant volcanism and tectonics D) plate tectonics and widespread erosion


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

johnpizzaz

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

D


P68T

  • Member
  • Posts: 509
Reply 2 on: Jul 27, 2018
Excellent

tkempin

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

White Sea Urchin White Sea Urchin
White Clover White Clover
Balmer Lines in the Spectrum of a Star Balmer Lines in the Spectrum of a Star
Mass Loss from a Supermassive Star Mass Loss from a Supermassive Star
Video: Decubitus Ulcer

For a complete list of videos, visit our video library