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3 years ago

What is the geographical problem on pretoria

Geography

1 answer:

Zinaida [17]3 years ago

5 0

Answer:

this is the answer

Explanation:

Pretoria was ranked as the most dangerous city in the country in 2020/21, with the highest crime score and lowest safety score. ... This is followed by assault and robbery, and property crimes like theft and motor vehicle theft

i hope it will help you

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How life has changed in the 21st century for womens in Germany

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Answer:

The roles of German women have changed throughout history, as the culture and society in which they lived had undergone various transformations. Historically, as well as presently, the situation of women differed between German regions, notably during the 20th century, when there was a different political and socioeconomic organization in West Germany compared to East Germany.[3] In addition, Southern Germany has a history of strong Roman Catholic influence.[4]

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3 years ago

When is the last day you can send in federal income tax forms?

stiv31 [10]

Answer

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Explanation:

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3 years ago

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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]

Answer: The correct answer is Option b.

Explanation:

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:

Option a: 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.

Option b: 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:

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

Option c: 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.

Option d: 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.

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4 years ago

The region drained by the Euphrates and Tigris Rivers is arid. True Or False

andreev551 [17]

I’m not entirely sure what is being asked here, but the Tigris and Euphrates rivers is the only place in Egypt (besides the nile delta) with non-arid ground. That’s why most people live around there:

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3 years ago

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AlladinOne [14]

Answer:

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Explanation:

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What is the geographical problem on pretoria​

What is the geographical problem on pretoria