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 85 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
:D TYSM

cici

  • Member
  • Posts: 325
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

Did you know?

Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

The evolution of the globin gene family in humans The evolution of the globin gene family in humans
A 1998 false-colour near-infrared image of Uranus showing cloud bands, rings, and moons obtained by A 1998 false-colour near-infrared image of Uranus showing cloud bands, rings, and moons obtained by
Physiological and evolutionary theories of aging. Physiological and evolutionary theories of aging.
Gestational evolution: Twin Development Gestational evolution: Twin Development
The decay constant of radon-222 is 0.181 d-1. If a sample of radon initially contains 6.00 × ... The decay constant of radon-222 is 0.181 d-1. If a sample of radon initially contains 6.00 × ...
evolution tree evolution tree
Video: Gastrulation: cross section of the frog

For a complete list of videos, visit our video library