« 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 80 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?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

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?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Luna, the Moon, from a 1550 edition of Guido Bonatti's Liber astronomiae. Luna, the Moon, from a 1550 edition of Guido Bonatti's Liber astronomiae.
Stars and constellations Stars and constellations
How Orbital Eccentricity Changes the Amount of Solar Radiation Earth Receives How Orbital Eccentricity Changes the Amount of Solar Radiation Earth Receives
Radiation Side Effects, Healing Time, and Intervention Radiation Side Effects, Healing Time, and Intervention
The Arctic is warming faster than any other region on Earth The Arctic is warming faster than any other region on Earth
When viewed from the Earth, Venus subtends an angle of about 1 arcminute (1/60°) when it is at ... When viewed from the Earth, Venus subtends an angle of about 1 arcminute (1/60°) when it is at ...
Video: Oral Hygiene & Braces Animation

For a complete list of videos, visit our video library