This topic contains a solution. Click here to go to the answer

Author Question: From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at ... (Read 46 times)

drink

  • Hero Member
  • *****
  • Posts: 554
From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at a wavelength of 121.6 nanometers (nm). The spectrum of a particular star shows the same hydrogen line appearing at a wavelength of 121.8 nm.
 
  What can we conclude? A) The star is moving toward us.
  B) The star is moving away from us.
  C) The star is getting hotter.
  D) The star is getting colder.
  E) The star actually is a planet.

Question 2

In special relativity, we learned that people in different reference frames will measure time differently. According to general relativity, why does this happen?
 
  A) People in different reference frames experience different realities.
  B) It is an illusion, and time really is the same for everyone.
  C) They have different worldlines.
  D) They are experiencing the same spacetime reality, but from different perspectives.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Jbrasil

  • Sr. Member
  • ****
  • Posts: 337
Answer to Question 1

B

Answer to Question 2

D




drink

  • Member
  • Posts: 554
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it


nyrave

  • Member
  • Posts: 344
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

For a complete list of videos, visit our video library