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Rom4ik [11]
3 years ago
7

Which of the following is true about radiation?

Geography
1 answer:
mars1129 [50]3 years ago
4 0

Answer:

Option (4)

Explanation:

The radiation are defined as the energy that is liberated from atoms in the form of electromagnetic waves or minute particles of matter. For example, the radiations that are emitted from the sun in the form of light.

This radiations are mainly of 3 types. This includes-

(a) Alpha Radiation- These are the short ranged particles and are very heavy. This radiations cannot penetrate the human skins but they can cause harmful diseases.

(b) Beta Radiation- These are also the short-ranged particles but they lighter. This radiations can penetrate the human skin upto the depth where the new skins are created.

(c) Gamma Radiation- These are highly dangerous and are penetrable to the human skin. This type of radiations are often used for the medical purposes.

Thus, the correct answer is option (4).

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Why are mountains narrower at the top than at the bottom?
densk [106]

Answer:

my guess is because mountains are formed from earthquakes etc right? like convergent boundaries. so the two tectonic plates go towards each other like this -><- and they push each other upwards. over time, since the peaks are so high up, whethering carves the peak into a point.

4 0
2 years ago
Help! <br> The answer choices are <br> A) 0-4 <br> B) 25-29 <br> C) 50-54 <br> D) 75-79
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Hope this helps.

8 0
3 years ago
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6 0
3 years ago
How many countries have spanish as their official or national language
Licemer1 [7]

Answer:

20 countries

Explanation:

The Spanish is one of the most spoken languages in the world. The main reason behind this is the influence the Spanish had in the Americas when they colonized very big portions of the two continents.

This language originates in Spain and spread out in the '' Age of Discoveries''. It is a language to belongs to the Romance languages, together with the likes of the Italian, Romanian, French, and Portuguese, and it is part of the Indo-European language family.

There are 20 countries in the world where the Spanish is an official or national language at the moment, those countries being Spain, Mexico, Colombia, Argentina, Peru, Ecuador, Bolivia, Venezuela, Chile, Paraguay, Uruguay, Cuba, Guatemala, Dominican Republic, Honduras, El Salvador, Nicaragua, Panama, Costa Rica, and Equatorial Guinea. Pureto Rico also has the Spanish as official language, but it is not a sovereign country.

8 0
3 years ago
What is the main difference between federal and confederal systems of government?
Degger [83]

Answer:

In a federal system there is no centralized authority, while in a confederal system power is distributed equally among the states.

Explanation:

The Federal government is a type of government in which sovereign power rests with the central government, while in a confederal government political power rests with individual states and very little with the central government.

8 0
3 years ago
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