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 62 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
Gracias!

kjohnson

  • Member
  • Posts: 330
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Some of the bacteria that can fix atmospheric nitrogen, converting it into a form usable by plants. Some of the bacteria that can fix atmospheric nitrogen, converting it into a form usable by plants.
The Structure of an Old High-Mass Star The Structure of an Old High-Mass Star
A Starburst Galaxy A Starburst Galaxy
Advection of an air mass with a different ELR (environmental lapse rate). Advection of an air mass with a different ELR (environmental lapse rate).
How to quickly determine the maximum or minimum value of a quadratic equation in standard form How to quickly determine the maximum or minimum value of a quadratic equation in standard form
Atomic Number and Mass Number Atomic Number and Mass Number
Video: Optic Nerve and Optic Disk Animation (Part 1 of 2)

For a complete list of videos, visit our video library