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

Author Question: Why is hydrogen less obvious in B stars than in A class? What will be an ideal ... (Read 65 times)

vinney12

  • Hero Member
  • *****
  • Posts: 586
on: Jul 27, 2018
Why is hydrogen less obvious in B stars than in A class?
 
  What will be an ideal response?

Question 2

If the density of the universe is greater than critical, then
 
  A) the universe will end up as nothing but black holes.
  B) the universe will continue expanding forever.
  C) there is more matter than energy.
  D) the universe is closed, gravity wins, and will shrink to the Big Crunch.
  E) the universe is flat, and Euclid is right.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

coreycathey

  • Sr. Member
  • ****
  • Posts: 333
Reply #1 on: Jul 27, 2018
Answer to Question 1

Above 10,000K, the hydrogen atoms are mostly ionized, and not able to absorb photons any more.

Answer to Question 2

D


vinney12

  • Member
  • Posts: 586
Reply 2 on: Jul 27, 2018
Excellent

cassie_ragen

  • Member
  • Posts: 347
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

These older adults are participating in an exercise class at their assisted-living facility These older adults are participating in an exercise class at their assisted-living facility
Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation. Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation.
John Lennon - Working Class Hero John Lennon - Working Class Hero
Grace Service, a YMCA missionary, explained that these porters worked at the base of Mount Omei in S Grace Service, a YMCA missionary, explained that these porters worked at the base of Mount Omei in S
Taking an interesting course can help keep your brain active. These seniors are taking a class in ... Taking an interesting course can help keep your brain active. These seniors are taking a class in ...
A very light ideal spring stretches by when it is used to hang a 135-N object. What is the ... A very light ideal spring stretches by when it is used to hang a 135-N object. What is the ...
Video: Double Vacuum Process (Illustration No Audio)

For a complete list of videos, visit our video library