Author Question: Assuming the encounter hypothesis is correct and planets can only form from the gravitational ... (Read 146 times)

karen

  • Hero Member
  • *****
  • Posts: 537
Assuming the encounter hypothesis is correct and planets can only form from the gravitational interactions between passing stars, what implications does this have for the possibility of life elsewhere in the universe?
 
  A) there would be no possibility of life at all because close stellar encounters never occur
  B) life would be exceedingly rare because close stellar encounters are exceedingly rare
  C) we have no way to determine the probability of close stellar encounters so we have no way of knowing
  D) life would be very common because stellar close encounters are constantly occurring

Question 2

The mass of Mars, 6.40  1023 kg, is about one-tenth that of the Earth, and its radius, 3395 km, is about half that of Earth. What is the mean density of Mars?
 
  What will be an ideal response?



jgranad15

  • Sr. Member
  • ****
  • Posts: 345
Answer to Question 1

B

Answer to Question 2

3.90  1012 kg/ km3



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

For a complete list of videos, visit our video library