« previous next »

Author Question: Assuming the encounter hypothesis is correct and planets can only form from the gravitational ... (Read 142 times)

karen

  • Hero Member
  • *****
  • Posts: 537
on: Jul 27, 2018
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
Reply #1 on: Jul 27, 2018
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

karen

  • Hero Member
  • *****
  • Posts: 537
Reply #2 on: Jul 27, 2018
TY


jgranad15

  • Sr. Member
  • ****
  • Posts: 345
Reply #3 on: Jul 27, 2018
You're welcome


« previous next »
 

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Evolutionary change in the tetrapod lineage, showing a transitional form. Evolutionary change in the tetrapod lineage, showing a transitional form.
Gravitational Lensing of Extremely Distant Galaxies Gravitational Lensing of Extremely Distant Galaxies
Instructions for Completing the CMS-1500 (02/12) Claim Form Continued Instructions for Completing the CMS-1500 (02/12) Claim Form Continued
Instructions for Completing the CMS-1500 (02/12) Claim Form Continued Instructions for Completing the CMS-1500 (02/12) Claim Form Continued
How to count for the correct number of significant digits How to count for the correct number of significant digits
How to analyze transformations of a quadratic equation that is in vertex form How to analyze transformations of a quadratic equation that is in vertex form
Video: Transmission Across a Synapse

For a complete list of videos, visit our video library