How did the relationship between the United States and the Soveit Union change between 1945 and 1947?

After World War II, relations between the U.S. and the U.S.S.R rapidly deteriorated. For example, the Soviets had promised free elections in the Eastern European territories it occupied during the war, then manipulated events to install puppet Communist regimes in all of those countries.

Explanation:

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radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.