There are many different ethnic groups present in Russia<span> and the countries of the former </span>Soviet Union<span> today. This diversity has been the source or instigator of conflict for centuries, and remains a major part of Russian political life today. While the Russian Empire, the USSR, and the Russian Federation were each made up of a majority of ethnic Russians, the minority groups have always been present to fight for their own languages, cultures, and religions.</span>[1]<span> There are many different types of ethnic conflict, and the vast majority can only be understood with the help of a historical context</span>
Answer:
After three half-lives, it is 7:1
Explanation:
- The rate at which the decay of the radioactive isotope is said to be half-life and is represented as the half-life of the atoms and the matter to disintegrate itself.
- The two radioactive isotopes are K 40 and Ar 40. After the K-Ar dating, they contain minerals such as the clay mica and the temphra minerals and Half-life of the K 40 is 1.3 more than 100,000 years i.e 10x9 years for Ar 40.
- <u>Thus the K 40 has to divide as three half-lives have passed if the ratio of argon to potassium atoms is 7:1. At the end of one half-life, the ratio of the number of argon to potassium atoms is 1:1. and two half lives its 3:1 thus after the third half-life it becomes as 7:1.</u>
Answer: Clastic sedimentary rock
Explanation: Sandstone is a type of rock that has the composition of sand sized rocks or minerals in it .They are clastic sedimentary rock because it gets formed from the clast .It is usually seen that sandstone is composed of quartz sand and some other sand as well.They also show a high resistance towards the natural weathering process while being on the earth surface.
