Astronomers are getting information about dark energy from

2 answers:

6 0

The only way of telling about dark energy is our observation of how the universe has been expanding. It basically works the opposite as gravity, pushing things away from it. Thus, the closest answer would be D. The shape of galaxies in cluster galaxies.

katrin [286]4 years ago

3 0

Answer:

D. The shape of galaxies in cluster galaxies

Explanation:

When the Universe began to expand, everything present in Universe began to move at a very high rate. This was concluded that some external force is working on it in order to pull these things. It was known as the dark energy.

Thus the size and shape of galaxies is increasing because of this dark energy, hence the study of change in shape and size of galaxy gives information about dark energy as it is constantly applying force thus increasing the size.

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Which reading strategy helps you to read and understand a passage quickly by making use of your previous knowledge?

Molodets [167]

Taking notes,because you can read back on what you learned

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3 years ago

A seismic wave is detected 100m, 5s after and explosion. Calculate the wave speed

sertanlavr [38]

we know that,

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3 years ago

Equations to use: v= λ ∙ f v=d/t

Margarita [4]

b. 460.8 m/s

Explanation:

The relationship between the speed of the wave along the string, the length of the string and the frequency of the note is

$f=\frac{v}{2L}$

where v is the speed of the wave, L is the length of the string and f is the frequency. Re-arranging the equation and substituting the data of the problem (L=0.90 m and f=256 Hz), we can find v:

$v=2Lf=2(0.90 m)(256 Hz)=460.8 m/s$