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

Author Question: Studying a spectrum from a star can tell us a lot. All of the following statements are true except ... (Read 87 times)

HudsonKB16

  • Hero Member
  • *****
  • Posts: 535
on: Jul 27, 2018
Studying a spectrum from a star can tell us a lot. All of the following statements are true except one. Which statement is not true?
 
  A) The total amount of light in the spectrum tells us the star's radius.
  B) The peak of the star's thermal emission tells us its temperature: hotter stars peak at shorter (bluer) wavelengths.
  C) We can identify chemical elements present in the star by recognizing patterns of spectral lines that correspond to particular chemicals.
  D) Shifts in the wavelengths of spectral lines compared to the wavelengths of those same lines measured in a laboratory on Earth can tell us the star's speed toward or away from us.

Question 2

According to the nebular theory, as an interstellar cloud forms a new star and planetary system it
 
  A) expands, cools down, and spins slower
  B) contracts, heats up, and spins faster
  C) expands, cools down, and spins faster
  D) contracts, heats up, and spins slower


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tofugiraffe

  • Sr. Member
  • ****
  • Posts: 319
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

B


HudsonKB16

  • Member
  • Posts: 535
Reply 2 on: Jul 27, 2018
Wow, this really help

aruss1303

  • Member
  • Posts: 314
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

A white dwarf star in orbit around Sirius (artist's impression) A white dwarf star in orbit around Sirius (artist's impression)
True-color view of Mars seen through NASA's Hubble Space Telescope in 1999 True-color view of Mars seen through NASA's Hubble Space Telescope in 1999
TrUe....FaLsE TrUe....FaLsE
A crescent Moon and "star" A crescent Moon and "star"
True Dover Sole True Dover Sole
For toluene (shown below), you would expect to see which m/z fragment in the mass spectrum? For toluene (shown below), you would expect to see which m/z fragment in the mass spectrum?
Video: Electrical Conduction System of the Heart

For a complete list of videos, visit our video library