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

Author Question: How do we know that galaxy clusters contain a lot of mass in the form of hot gas that fills spaces ... (Read 53 times)

yoooooman

  • Hero Member
  • *****
  • Posts: 557
on: Jul 27, 2018
How do we know that galaxy clusters contain a lot of mass in the form of hot gas that fills spaces between individual galaxies?
 
  A) The hot gas shows up as bright pink in visible-light photos of galaxy clusters.
  B) We infer its existence by observing its gravitational effects on the galaxy motions.
  C) We detect this gas with X-ray telescopes.
  D) We can observe the frictional effects of the hot gas in slowing the speeds of galaxies in the clusters.

Question 2

Kepler relied heavily on the telescopic observations of Galileo in developing his laws of planetary motion.
 
  Indicate whether the statement is true or false


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

laurnthompson

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

FALSE


yoooooman

  • Member
  • Posts: 557
Reply 2 on: Jul 27, 2018
Excellent

AmberC1996

  • Member
  • Posts: 317
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Mass Loss by a Supermassive Star Mass Loss by a Supermassive Star
A computerized patient registration form used by offices with electronic health records. A computerized patient registration form used by offices with electronic health records.
How to use transformations to graph quadratic equations in vertex form How to use transformations to graph quadratic equations in vertex form
Mass Wasting Triggers Mass Wasting Triggers
How many grams of tartaric acid, H2C4H4O6, (molar mass = 150.10 g) are needed to How many grams of tartaric acid, H2C4H4O6, (molar mass = 150.10 g) are needed to
Mass spectrometry for identifying an unknown protein isolated from a 2D gel Mass spectrometry for identifying an unknown protein isolated from a 2D gel
Video: Proteins

For a complete list of videos, visit our video library