Beginning with earth, summarize the structure of the universe. Also Andromeda galaxy is located appromaxily 2.5 million light-years from earth. Why is the light that reaches earth 2.5 million years old. So many points look.

Answers

Answer 1

Answer: because of the power of the light it is very strong so that is why light reaches all the way to earth

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Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not?A.Helium has no mass, but air does.
B.Helium increases the balloon's mass more than air.
C.Helium has a higher density than air.
D.Helium has a lower density than air.

Answers

Compared to the air the density of helium gas is very less. The less dense helium will float on air. That's why balloon filled with He gas rise in air.

What is helium?

Helium is 2nd element in periodic table. It is a non-metal and is placed with the noble gases because it is having fully filled electronic configuration leading to the stability.

Density of a substance is the ratio of its mass to the volume. When a substance is less dense than the fluid on which it occupy, it will float on the fluid. If it is more denser it will sink on it.

The density of helium is very much lower than that of air. Therefore, the balloon filled with helium gas will rise in the air, while the balloon with filled with air does not.

Find more on helium :

brainly.com/question/4945478

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i think the answer should be D.

Gravity affects all mass, how?

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Answer:

Everything that has mass has gravity. The greater the amount of mass, the greater the gravity. And the closer objects are to each other, the stronger their gravitational pull is. The reason we have weight is because of the gravitational pull on our bodies (our mass) by the Earth.

Explanation:

Answer:

Explanation:

Does a cell ever reach equilibrium

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it nevers reaches equilibrium

Cells never reach equilibrium.

What considerations are important in a well planned system for handling emergency situations

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have a well thought out plan to begin with

Which object moves in simple harmonic motion?\a stretched rubber band with an mass
b rolling ball going down a hill
c moving car
d orbiting satellite

Answers

Answer:Stretched rubber band with an mass

Explanation:

Simple harmonic motion requires a restoring force.

Simple harmonic motion should be periodic.

Option A:

When a rubber band is stretched,the internal forces of the rubber band pulls the band inside.So,internal forces are the restoring forces in a rubber band.

The motion is periodic as well since the the rubber band makes to an fro motion expanding ans contracting.

So,this performs SHM.

Option B:

There is no restoring force and no periodicity.

So,this is not SHM.

Option C:

There is no restoring force and no periodicity.

So,this is not SHM.

Option D:

There is periodicity but no restoring force.

So,this is not SHM.

Does a brick have thermal energy? Also does paper haven't thermal energy?