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

Author Question: Why would a value of 500 km/s/Mpc for the Hubble constant contradict theories of stellar evolution? ... (Read 22 times)

jho37

  • Hero Member
  • *****
  • Posts: 531
on: Jul 27, 2018
Why would a value of 500 km/s/Mpc for the Hubble constant contradict theories of stellar evolution?
 
  What will be an ideal response?

Question 2

How might we tell whether the Universe is open or closed?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jazzlynnnnn

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 27, 2018
Answer to Question 1

The Hubble time for this value is 2 billion years. Astronomers know of globular star clusters that are significantly older than 9.5 billion years.

Answer to Question 2

According to general relativity, the overall curvature of space-time is determined by the average density of matter plus energy in the Universe. Cosmologists could calculate that space-time is flat if the average density of the Universe equals a critical density. If the average density of the Universe is more than the critical density, the Universe must be closed; and if it is less, the Universe must be open.


jho37

  • Member
  • Posts: 531
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

FergA

  • Member
  • Posts: 352
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

Everyone has one nostril that is larger than the other.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

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.

Evolution of tetrapod visual opsins Evolution of tetrapod visual opsins
Evolution of the Sun's luminosity, radius and effective temperature compared to the present Sun Evolution of the Sun's luminosity, radius and effective temperature compared to the present Sun
The early hominin evolution The early hominin evolution
Landscape Evolution in a Basin and Range Region Landscape Evolution in a Basin and Range Region
evolution tree evolution tree
evolution tree evolution tree
Video: ATPase function - membrane transport, contractile proteins and synthesis

For a complete list of videos, visit our video library