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

Author Question: From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at ... (Read 33 times)

drink

  • Hero Member
  • *****
  • Posts: 554
on: Jul 27, 2018
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
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

D


drink

  • Member
  • Posts: 554
Reply 2 on: Jul 27, 2018
Wow, this really help

AngeliqueG

  • Member
  • Posts: 343
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

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?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

Examples of hydrogen bonds Examples of hydrogen bonds
The effects of germ-line versus somatic cell mutations. The effects of germ-line versus somatic cell mutations.
Isotopes of Hydrogen Isotopes of Hydrogen
the comet Encke riding along its pebbly trail of debris (long diagonal line) between the orbits of M the comet Encke riding along its pebbly trail of debris (long diagonal line) between the orbits of M
An Underwriters Laboratory mark. An Underwriters Laboratory mark.
Hydrogen-bond donors and acceptors in water Hydrogen-bond donors and acceptors in water
Video: Interview with an Anorexic Woman (Part 1 of 2)

For a complete list of videos, visit our video library