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

Author Question: Briefly summarize current knowledge about the term flife in the equation Number of Civilizations = ... (Read 57 times)

xclash

  • Hero Member
  • *****
  • Posts: 681
on: Jul 27, 2018
Briefly summarize current knowledge about the term flife in the equation
  Number of Civilizations = NHP  flife  fcivilization  fnow.
 
  What will be an ideal response?

Question 2

Why do we sometimes observe asteroids at the distances of the gaps in the asteroid belt?
 
  A) Jupiter's gravitational tugs keep them there.
  B) They are held in place by resonances with other asteroids.
  C) Actually, we never see asteroids in the gaps.
  D) They are kept in place by shepherding asteroids.
  E) A gap is located at an average orbital distance, and asteroid orbits often have large eccentricities.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

samiel-sayed

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 27, 2018
Answer to Question 1

flife is the fraction of habitable planets with life. We know that at least one planet within its star's habitability zone has developed life, namely the Earth, but beyond that, we have no real evidence on which to base an estimate of the value of flife.

Answer to Question 2

E


xclash

  • Member
  • Posts: 681
Reply 2 on: Jul 27, 2018
Wow, this really help

debra928

  • Member
  • Posts: 342
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

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.

Past and current ranges of the grizzly bear. Past and current ranges of the grizzly bear.
Isotopes may be stable or radioactive depending on the arrangement and number of neutrons in the nuc Isotopes may be stable or radioactive depending on the arrangement and number of neutrons in the nuc
Example of Index entry with Main Term and indented subterms. Example of Index entry with Main Term and indented subterms.
The term “natural,” when used on the packaging of meat and poultry The term “natural,” when used on the packaging of meat and poultry
Algebraically solve the equation sec^2 θ-2=0 such that -π ≤ θ ≤ π Algebraically solve the equation sec^2 θ-2=0 such that -π ≤ θ ≤ π
Calculate the number of sodium ions in 0.375moles of Na2CO3.10H20 Calculate the number of sodium ions in 0.375moles of Na2CO3.10H20
Video: Chemical Messengers Animation

For a complete list of videos, visit our video library