« previous next »

Author Question: Suppose the laboratory wavelength of a spectral line is 600 nm. In a star it is measured to be 599.4 ... (Read 50 times)

tfester

  • Hero Member
  • *****
  • Posts: 534
on: Jul 27, 2018
Suppose the laboratory wavelength of a spectral line is 600 nm. In a star it is measured to be 599.4 nm. Is the star moving toward or away from us, relative to the line of sight? How fast is it moving? (Hint: c = 300,000 km/s)
 
  a. toward; 300 km/s
  b. away; 300 km/s
  c. at rest; 0 km/s
  d. sideways; 300 km/s
  e. toward; 150 km/s

Question 2

The Sun traces a path along the ecliptic in a period that is longer than 365 days.
 
  a. True
  b. False
  Indicate whether the statement is true or false


Silverbeard98

  • Sr. Member
  • ****
  • Posts: 355
Reply #1 on: Jul 27, 2018
Answer to Question 1

a

Answer to Question 2

True


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

tfester

  • Hero Member
  • *****
  • Posts: 534
Reply #2 on: Jul 27, 2018
Thanks


Silverbeard98

  • Sr. Member
  • ****
  • Posts: 355
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Mechanoreceptors in the lateral line system that detect changes in water movement. Mechanoreceptors in the lateral line system that detect changes in water movement.
Chuckwalla body lengths at the end of a laboratory rearing experiment Chuckwalla body lengths at the end of a laboratory rearing experiment
Venous Star Venous Star
Star-nosed mole Star-nosed mole
Mass Loss from a Supermassive Star Mass Loss from a Supermassive Star
Offset Method Plot of Land with Length Line Offset Method Plot of Land with Length Line
Video: Bone Growth and Remodeling

For a complete list of videos, visit our video library