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

Author Question: Briefly summarize current knowledge about the term NHP in the equation Number of Civilizations = ... (Read 64 times)

beccaep

  • Hero Member
  • *****
  • Posts: 535
on: Jul 27, 2018
Briefly summarize current knowledge about the term NHP in the equation
  Number of Civilizations = NHP  flife  fcivilization  fnow.
 
  What will be an ideal response?

Question 2

A rock sample from the moon includes a mineral that contains small amounts of the radioactive isotope Potassium-40 and its daughter element Argon-40 (half-life of 1.3 billion years). This mineral would not form with any Argon-40.
 
  Consider a crystal with 7 atoms of Argon-40 for every 1 atom of Potassium-40. How many atoms of Potassium-40 were present when the crystal formed for each atom of Potassium-40 that exists today?
  A) 1 B) 7 C) 8 D) None


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

smrerig

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jul 27, 2018
Answer to Question 1

NHP is the number of planets in the Milky Way that lie within the habitability zones of their parent stars. Currently, we have evidence for more than one thousand planets around other stars, and evidence for protoplanetary disks around many more stars. Although we cannot yet give a precise value to NHP, it now seems likely that it is quite largeperhaps as large as the number of stars in the Milky Way Galaxy.

Answer to Question 2

C


beccaep

  • Member
  • Posts: 535
Reply 2 on: Jul 27, 2018
Wow, this really help

sailorcrescent

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The average adult has about 21 square feet of skin.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

Example of Index entry with Main Term and indented subterms. Example of Index entry with Main Term and indented subterms.
How to sketch a quadratic equation that is in standard form (Question 1) How to sketch a quadratic equation that is in standard form (Question 1)
What would your average (mean) number of cells per cluster be? What would your average (mean) number of cells per cluster be?
The relationship between the number of stem cell divisions in the lifetime of a given tissue and the The relationship between the number of stem cell divisions in the lifetime of a given tissue and the
Number chart Number chart
Number of cells in the brain Number of cells in the brain
Video: Secondary Active Transport

For a complete list of videos, visit our video library