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3 years ago

If you are looking at the sky, how can you determine if a cloud is low-level, mid-level or

Geography

1 answer:

Greeley [361]3 years ago

5 0

Probably look in the middle of the cloud and then try to figure it out through the density it seems to be. lol

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a u.s. navy destroyer recently witnessed an extremely close overflight by unarmed fighter jets from what country?

Rom4ik [11]

There where Russian fighter jets

5 0

3 years ago

If a star is able to stabilize after there is no more hydrogen in its core, then it is now fusing helium nuclei together in a re

avanturin [10]

<u>Answer:</u> The correct answer is Option b.

<u>Explanation:</u>

Nuclear fusion reaction is defined as the reaction in which lighter nuclei combine together to form a single heavier nuclei.

Another name for helium nuclei is alpha particle.

For the given options:

<u>Option a:</u> The CNO cycle

This cycle is named as carbon-nitrogen-oxygen cycle. In this cycle, carbon absorbs a proton to form nitrogen which further absorbs a photon to form oxygen. Thus, helium particles are not getting fused in this process.

<u>Option b:</u> The triple alpha process

This process is a set of nuclear reaction in which 3 alpha or helium nuclei combine together to form carbon nucleus.

The equation representing the fusion process follows:

$_2^4\textrm{He}+_2^4\textrm{He}\rightarrow _4^8\textrm{Be}+\gamma\\\\_4^8\textrm{Be}+_2^4\textrm{He}\rightarrow _6^{12}\textrm{C}+\gamma$

<u>Option c:</u> Photo dissociation

This is defined as the process in which a chemical compound is broken down by photons. Thus, helium particles are not getting fused in this process.

<u>Option d:</u> The proton-proton chain

This process is a set of nuclear fusion reactions by which stars convert hydrogen nucleus to helium nucleus. The chemical reactions for this process are:

$_1^1\textrm{H}+_1^1\textrm{H}\rightarrow _1^2\textrm{H}+_{+1}^0\textrm{e}+\text{energy}\\\\_1^2\textrm{H}+_1^1\textrm{H}\rightarrow _2^3\textrm{He}+\text{energy}\\\\_2^3\textrm{He}+_1^1\textrm{H}\rightarrow _2^4\textrm{He}+_{+1}^0\textrm{e}+\text{energy}$

Here, fusion of protons takes place.

Hence, the correct answer is Option b.

7 0

4 years ago

The Midwestern United States is an example of which type of culture region?

inn [45]

<span>The answer is definitely C. The Midwestern United States is an example of a vernacular region. Indeed, the Midwestern has been generally acquainted and explained by both travelers and habitants quite mistakenly (most of them characterize the region as some little town and so on). Moreover, the vernacular element can also be found by paying attention to the emotional charges these people display while talking about the Midwestern (most of them knows everybody in town and they have still ongoing things with some of the city residents). </span>

7 0

3 years ago

Name three factors that are responsible for the deadline of the giraffe populations

Nitella [24]

Human expansion, Hunting and increased poaching.

BOOM

Hope this helps :)

8 0

3 years ago

water pollution is a major problem in urban areas. With reference to examples, explain some of the causes of this pollution, and

Irina18 [472]

Water pollution which is a major problem in urban areas have some of the causes such as dumping refuse to the water bodies, discharging of industrial wastes to the water bodies and it is a major problem to the people who rely on this water supply because they can contact disease from the water when they drink it.

<h3 /><h3>What is water pollution?</h3>

Water pollution can be described as the act of dropping any substance that can contaminate the natural state of water into the water bodies.

It should be noted that this one of the problem in the urban cities and this as a result of the discharging of waste from the industries.