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
Yuki888 [10]
3 years ago
8

How has the Doppler effect and the redshift of stars and galaxies indicated that the universe is expanding?

Biology
2 answers:
kiruha [24]3 years ago
4 0

Answer:

The effect of red shifting in wavelength is continuously increasing which depicts the expansion of universe.

Explanation:

In Doppler shift there occurs an apparent change in the wavelength of the light emitted by star

For example – If a star is near to earth, the light emitted by it would be shorter in wavelength while a star far away from earth will emit a light that has a longer wavelength.  

Thus a shorter wavelength light is shifted towards  the end of spectrum which is blue while a longer wavelength light shifts towards the red end of spectrum (known as redshift)

The farther the star from earth , the more it is red shifted . The red shift effect is continuously increasing.

Hence, both Doppler and redshift affect depicts that universe is continuously expanding.

sertanlavr [38]3 years ago
3 0
The could tell by solar radiation and dark matter, they didnt know were dark matter was but they new it was there
You might be interested in
Determine the mass number of an atom if the given the number of protons and neutrons
REY [17]

Answer:

Add them!

Explanation:

The mass number of an atom is its total number of protons and neutrons

5 0
3 years ago
Metamorphic rocks tend to show the same properties as the rocks they were formed from Question 3 options: True False
Ede4ka [16]
False because wen metamorphic rocks form they change there shape and they ether get bigger or smaller
6 0
3 years ago
Read 2 more answers
Explain the importance of immunological memory cells. Describe in detail how and when memory cells arise and explain how they fo
Vlad1618 [11]

Explanation:

<em>Immunological memory</em> is the property of the immune system to store information about a stimulus so it can mount an effective response if it encounters the same stimulus again being this second response quicker and stronger even after years since the first encounter.

This kind of response is dependent on many subpopulations within T and B lymphocytes and NK cells. When encountering an antigen, B cells recognize it by membrane antibody specifically binding to the antigen and then being activated to expand rapidly with their progeny clones differentiating into plasma and memory B cells, these last ones have a long life span to remain in the body, ready when another encounter with the same stimulus occurs, this is how the basis for effective immunizations happens.

I hope you find this information useful! Good luck!

4 0
3 years ago
If 84 J of work are exerted to pull a wagon, how much force does it take to pull the wagon 7.0 m? Round your answer to the neare
nirvana33 [79]
Work is said to be done when an object moves due to a force applied. Work is calculated by multiplying the force applied and the distance traveled due to the force. It is expressed as:

W = Force x distance

W = 84 J = F (7.0 m)
F = 12 N

Hope this answers the question.
6 0
3 years ago
Read 2 more answers
"Could you please help me? I have a question that is honestly NOT a homework
iren2701 [21]
It is not common but yes an ab parent can have an O child
3 0
2 years ago
Other questions:
  • Which is the proper procedure for delivering prepared hot food off-site? 1. drive to the off-site location as quickly as possibl
    10·1 answer
  • Which statement about the composition of ocean water is true?
    9·1 answer
  • Which of these cell structures is used to transport chromosomes across a cell during cell division?
    5·1 answer
  • Explain how the situation described in the article shows that the outside environment can help and hurt cells
    10·1 answer
  • Asap plzzzz help I will give brainliest​
    15·1 answer
  • Which of the following adaptations will help a plant survive in a dessert?
    14·2 answers
  • Please help me ! I have a testtt
    7·2 answers
  • It's estimated that without the development of this
    14·1 answer
  • what are the 3 ways a species can become isolated and form new species? define what each of them mean.
    15·1 answer
  • The Truth About Milk Essay! Please read! Rate this from a scale of 1 - 10 and please share! Link leads to petition
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!