« previous next »

Author Question: The time for the Moon to orbit Earth, relative to the stars is A) 23 hours, 56 minutes. B) about ... (Read 92 times)

vinney12

  • Hero Member
  • *****
  • Posts: 586
on: Jul 27, 2018
The time for the Moon to orbit Earth, relative to the stars is
 
  A) 23 hours, 56 minutes.
  B) about 7 days.
  C) 27.3 days.
  D) 29.5 days.
  E) 18 years, 11.3 days.

Question 2

Doppler shifted hydrogen absorption lines are seen in the spectrum of a star. The hydrogen line at 656.28 nm is seen to be shifted to 656.08 nm. The star is moving at which fraction of the speed of light?
 
  A) about 0.000003 (3  106 ) B) about 0.0003 (3 104 )
  C) about 0.2 D) about 0.03 (3  102 )


TheNamesImani

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

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.

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

The Pleiades, an open cluster of stars in the constellation of Taurus. The Pleiades, an open cluster of stars in the constellation of Taurus.
Time Slows Down Near Matter Time Slows Down Near Matter
Adenosine, Time of Day, and Hunger Adenosine, Time of Day, and Hunger
Neil Young - Harvest Moon Neil Young - Harvest Moon
Astronaut Rachel leaves Earth in a spaceship at a speed of 0.960c relative to an observer on ... Astronaut Rachel leaves Earth in a spaceship at a speed of 0.960c relative to an observer on ...
A 500-kg cannon fires a 4.0-kg projectile with a velocity of 500 m/s relative to A 500-kg cannon fires a 4.0-kg projectile with a velocity of 500 m/s relative to
Video: Transferring genes into plants Animation

For a complete list of videos, visit our video library