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

Author Question: According to modern science, approximately how old is the Sun? A) 25 million years B) 10,000 ... (Read 40 times)

drink

  • Hero Member
  • *****
  • Posts: 554
on: Jul 27, 2018
According to modern science, approximately how old is the Sun?
 
  A) 25 million years B) 10,000 years C) 400 million years D) 4.5 billion years

Question 2

Explain why an absorption line spectrum is not filled back in (to make the original continuous spectrum) by the photons that are emitted as the excited electrons decay back down to their original energy levels.
 
  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

milbourne11

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

The photons emitted by the decays are emitted in random directions. Hence only a fraction of them are sent back in their original direction towards us.


drink

  • Hero Member
  • *****
  • Posts: 554
Reply #2 on: Jul 27, 2018
Thank you!


milbourne11

  • Sr. Member
  • ****
  • Posts: 322
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Luna Park at Coney Island was a vast living theater in which strollers were both spectators and acto Luna Park at Coney Island was a vast living theater in which strollers were both spectators and acto
Atmospheric CO2 Concentrations Increased Very Rapidly during the Last 200 Years Atmospheric CO2 Concentrations Increased Very Rapidly during the Last 200 Years
Example of an approximately 37,500 probespotted oligo microarray. Example of an approximately 37,500 probespotted oligo microarray.
Science Joke Science Joke
Chemistry: The Central Science (13th Edition) Chemistry: The Central Science (13th Edition)
Modern house door design Modern house door design
Video: Primate Evolutionary Tree Animation

For a complete list of videos, visit our video library