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

Author Question: Large meteoroids are thought to collide with Earth: A) at least once a decade. B) about once a ... (Read 45 times)

cnetterville

  • Hero Member
  • *****
  • Posts: 547
on: Jul 27, 2018
Large meteoroids are thought to collide with Earth:
 
  A) at least once a decade.
  B) about once a century.
  C) a few times in every million-year period.
  D) once every billion years.
  E) never; only comets are thought to collide with Earth.

Question 2

How does gravity lensing let us find massive dark objects?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

brittiany.barnes

  • Sr. Member
  • ****
  • Posts: 321
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

When a black hole or brown dwarf passes between us and a bright star, the gravity of the dark object can bend and focus the light of the distant star, making it brighten temporarily. The more massive the unseen object, the longer this brightening will last.


cnetterville

  • Member
  • Posts: 547
Reply 2 on: Jul 27, 2018
Gracias!

yeungji

  • Member
  • Posts: 319
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Medication errors are more common among seriously ill patients than with those with minor conditions.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Oceanic circulation, which is driven mainly by the prevailing winds, moderates earth's climate. Oceanic circulation, which is driven mainly by the prevailing winds, moderates earth's climate.
Wandering Albatrosses are colonial but have large widely spaced territories. Here a pair performs th Wandering Albatrosses are colonial but have large widely spaced territories. Here a pair performs th
Thought this was pretty funny... Thought this was pretty funny...
Oil Refineries Are Large and Complex Facilities Oil Refineries Are Large and Complex Facilities
Small Avocado vs Large Avocado Small Avocado vs Large Avocado
Earth’s tilt and yearly rotation around the sun cause seasonal effects. The 23° tilt of Earth’s ... Earth’s tilt and yearly rotation around the sun cause seasonal effects. The 23° tilt of Earth’s ...
Video: Automated external defibrillator (AED)

For a complete list of videos, visit our video library