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4 years ago

Answer each of the following questions:

Physics

1 answer:

LenKa [72]4 years ago

7 0

Answer:

Part a) Big bang occurred about 13.8 billion years ago. This time is arrived after see the shift in the cosmic background radiation that fills the universe. The result of the big bang was the creation of universe itself. Everything we know space, matter, time was created by the event thus giving birth to the universe and stars, galaxies,e.t.c.

Part b) No string theory is currently not proven as of yet. The basic problem in formulating the theory of everything is to mix 2 completely different theories known as quantum theory of matter and theory of relativity. But this has not been achieved as of yet. There are different theories that try to explain the both quantum and relativistic nature of the matter and string theory is one of the theories that has been proposed to explain the same.The theory is not completely developed as of yet as there are numerous inconsistencies with it such as it proposes 34 dimension's of nature which have not been observed as yet.Also there is an inherent nature of the theory that it deals with quantities with $10^{34}m$ scales of length making it impossible to verify the theory which still is mathematically incomplete.

Part c) Strong Nuclear forces come into action in the nucleus of an atom and holds the nucleon's together. As we know that a pair of protons will repel due to nature of their charge the strong nuclear force holds them together.

Part d) Cosmology is the branch of astronomy that deals with the origin and evolution of the universe. It basically is the study about the universe was formed and how it evolved during different stages.

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One plate goes under another in a _____.

marta [7]

One plate goes under another in the subduction zone. So for the given question, the correct option is option “A”. Subduction rates are not very high. They can be only a few centimeters per year and that is the reason people do not feel the effect. The plates between which the shifting occurs can either be oceanic crust or the continental crust. Mountain formations are necessarily associated with subduction movements of plates. In such cases the movements are huge and can result in earth quakes as well.

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3 years ago

Question 20

fenix001 [56]

Answer:

(b) Water

Explanation:

The density of the liquid is found by dividing its mass by its volume.

The mass of the liquid is the difference in mass between the full and empty graduated cylinder:

liquid mass = (145 g) -(45 g) = 100 g

<h3>volume</h3>

The cylinder is said to contain 100 mL of the liquid, so that is the volume of interest.

<h3>density</h3>

The ratio of mass to volume is the liquid's density:

ρ = (100 g)/(100 mL) = 1 g/mL

This density identifies the most likely liquid as water.

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2 years ago

The name dinitrogen tetroxide tells you that this compound contains

Leto [7]

The answer to that is c hope it helps

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4 years ago

Which of these statements best proves that electromagnetic forces are weaker than strong nuclear forces? Neutrons do not repel o

musickatia [10]

Answer: <span>Protons do not move out of the nucleus of atoms although they repel each other.

Reasoning:

Remember that protons are particles with positive charge and they held together in the nucleus of the atom which is a tiny tiny region. As you know, like charges repel each other, which means that the protons exert a repulsion force.

That repulsion force tends to destabilize the atom. The only reason why the atom does not explode is because there is a there exists a force of attraction that exceeds the repulsion of the like charged protons. That is the strong nuclear force. Therefore, the strong nuclear forces are stronger than the electromagnetic force that tends to get the protons apart.
</span>

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3 years ago

The speed of a car during a trip is represented in the graph. Compare distance and displacement at four hours into the trip.

mezya [45]

Answer:

The answer to your question is: D.

Explanation:

Distance refers to the amount of space between two points, it is a scalar quantity.

Displacement refers to the space between two points, measure from the minimum path linking them, it is a vector quantity.

I'm not agree with these answers, because the total distance is approximately 500km.

A) The distance traveled is 300 km. This answer is not correct.

B) Distance is 300 km and displacement is 0 km. This answer is not correct because the displacement is also 500 km.

C) Distance is 300 km/hour and displacement is 300 km. 300 km/h is a measure of speed not of distance, this option is wrong.

D) Both distance traveled and displacement are 300 km. I think this is the correct answer because distance and displacement measure the same. but I think both measure 500 km.

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3 years ago

Read 2 more answers