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

Author Question: One of the absorption lines of hydrogen has a rest wavelength of 656 nm (at rest means with respect ... (Read 70 times)

rosent76

  • Hero Member
  • *****
  • Posts: 516
on: Jul 27, 2018
One of the absorption lines of hydrogen has a rest wavelength of 656 nm (at rest means with respect to the observer, like in a lab). You observe several stars and measure the wavelength of this same hydrogen absorption line in each star.
 
  Based on the measured wavelength of this line, which star is moving towards the Earth the fastest?
  A) 670 nm B) 640 nm C) 656 nm D) 630 nm E) 680 nm

Question 2

Which of the following telescopes is best suited for studying the hottest intergalactic gas (10 million K) in a cluster of galaxies?
 
  A) Very Large Array Radio Telescope
  B) Chandra X-ray Telescope
  C) Herschel Infrared Telescope
  D) Hubble Space Telescope (UV and optical and some infrared)


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ryhom

  • Sr. Member
  • ****
  • Posts: 366
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

B


rosent76

  • Hero Member
  • *****
  • Posts: 516
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


ryhom

  • Sr. Member
  • ****
  • Posts: 366
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

The four processes of pharmacokinetics: absorption, distribution, metabolism, and excretion The four processes of pharmacokinetics: absorption, distribution, metabolism, and excretion
Hydrogen Bond Hydrogen Bond
Lines of the anterior thorax Lines of the anterior thorax
Hydrogen bond Hydrogen bond
A melting profile shows the increase in UV absorption versus temperature A melting profile shows the increase in UV absorption versus temperature
Summary of digestion and absorption in the small intestine Summary of digestion and absorption in the small intestine
Video: Protein catabolism (Krebs cycle) and Protein anabolism (protein synthesis)

For a complete list of videos, visit our video library