1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
horsena [70]
3 years ago
11

The actual matter density of the universe, accounting for all of the luminous matter and all of the dark matter known to exist i

n galaxies and clusters, is what fraction of the critical density?
Social Studies
1 answer:
goldfiish [28.3K]3 years ago
5 0

Answer:  The correct answer is :  The critical density for the universe is approximately 10 ^ -26 kg / m ^ 3 or you can also say 10 hydrogen atoms per cubic meter.

Explanation:  This value is given by:

critical density = 3H ^ 2/2 Pi G, where H is the Hubble constant and G is Newton's gravitational constant.

Critical density is the average density of matter necessary for the universe to stop its expansion but after an infinite time.

You might be interested in
Which term describes a budget in which expenditures exceed revenue?
tekilochka [14]
It's C. Budget deficit
3 0
3 years ago
Read 2 more answers
Impala share the African plains with other grazing animals and predators. Which change would lead to a DECREASE in the impala po
Anit [1.1K]

Answer: Increase in number of other grazing animals

Explanation:

Impala feeds on plants. And based on they are found in areas close to rare water and some perspective of desert, they have limited resources to themselves and their young ones. Their major population reducer would be other grazing animals that come to share the same food that they feed on

7 0
3 years ago
This theory says that each of us is born with a fundamental drive to seek, form, maintain, and protect strong social relationshi
lord [1]

Answer:

B - need to belong theory.

Explanation:

As the exercise briefly describes, the theory that says that each of us is born with a fundamental drive to seek, form, maintain, and protect strong social relationships is called need to belong theory. This refers to the idea that we, as humans, have the fundamental motivation to be accepted into social groups, stating that belongingness is a need.

7 0
3 years ago
Which terms ALL correctly describe systems and types of government in the United States?
Fudgin [204]

Answer:

The Federal government

Explanation:

The the federal government has the judiciary so legislation and the executive branch (checks and balances)

8 0
3 years ago
Chang"an can best be described as
FrozenT [24]

Chang'an means of "<em>Perpetual Peace</em>" in traditional Chinese; and it can be described as an "<em>Everlasting Capital</em>" because it was persistently used as a capital again and again by many fresh Chinese rulers (<em>more than 10 dynasties</em>);

it can also be described as a <em>flourishing</em> cultural & <em>commercial center</em>; Chang'an has been one of the most important cities of the world.

4 0
3 years ago
Other questions:
  • Which of the following are the three dimensions of Wundt's tridimensional theory of feelings?
    15·1 answer
  • A ______________ is a corporate group that shares an identity based on such traits as history, culture, territory, and so on, an
    7·1 answer
  • Why is the Danube River important to Eastern Europe?It connects Central Europe with Eastern Europe.It contains large deposits of
    14·2 answers
  • What do historians refer to when they discuss causation
    11·2 answers
  • Explain how the Union benefited from the imposed protective tariffs on imports?pls help quickly :). thank you
    12·2 answers
  • In the Netherlands, land that has been reclaimed from the sea is called a __________. A. ---- B. polder C. peninsula D. fjord
    11·2 answers
  • Contrast the election of representatives with the election of senators. Support your answer with information from both articles.
    6·1 answer
  • Please help me in this question​
    10·1 answer
  • PWEASEEEE HALPPPP
    11·1 answer
  • The hormone called _________ plays an important role in synchronizing physiological function with the cycle of daylight and dark
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!