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

Author Question: Our Sun is considered to be a(n) ________. A) brown dwarf B) low-mass star C) high-mass star D) ... (Read 78 times)

nramada

  • Hero Member
  • *****
  • Posts: 580
on: Jul 27, 2018
Our Sun is considered to be a(n) ________.
 
  A) brown dwarf B) low-mass star
  C) high-mass star D) intermediate-mass star

Question 2

How do X-ray measurements help us measure the amount of dark matter in galaxy clusters?
 
  A) X-rays are emitted by hot gas, and the intracluster gas is heated by collisions with dark matter particles. More dark matter leads to greater heating, and hence stronger X-ray emission.
  B) Dark matter absorbs X-rays. Therefore, more dark matter leads to weaker X-ray emission from galaxy clusters.
  C) X-rays are emitted by hot gas, and the intracluster gas is heated by the gravitational effects of dark matter. More dark matter leads to greater heating, and hence stronger X-ray emission.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

javimendoza7

  • Sr. Member
  • ****
  • Posts: 293
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

C


nramada

  • Member
  • Posts: 580
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

jackie

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

The Border Collie is considered to be one of the most intelligent breeds. The Border Collie is considered to be one of the most intelligent breeds.
Brown hyena Brown hyena
California high desert cottontail eating a carrot California high desert cottontail eating a carrot
Many seniors pursue new careers, education, and hobbies well beyond what used to be considered ... Many seniors pursue new careers, education, and hobbies well beyond what used to be considered ...
Mass Wasting Forms Mass Wasting Forms
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: Splitting of Sugar, Oxidation/ Reduction & ATP Generation

For a complete list of videos, visit our video library