Author Question: Assuming the encounter hypothesis is correct and planets can only form from the gravitational ... (Read 150 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 heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

For a complete list of videos, visit our video library