Why did problems resurface between the two groups in Czechoslovakia?

The political union of Czechs and Slovaks after World War I was feasible because the two ethnic groups are closely related in language, religion, and general culture. An independent Czechoslovak state was declared by Tomáš Masaryk, Edvard Beneš, and other leaders on October 28, 1918, and was quickly recognized by France and other Allied opponents of Austria. Bohemia and Moravia, populated by Czechs, constituted its western portion, while Slovakia occupied the eastern portion.

Explanation:Hope that answers your question :)

since most of current immigration into the u.s., both legal and illegal, is coming from latin america. it would be very difficult to imagine or rationalize a country my fellow citizens are trying desperately to flee into, would pose a threat to my prosperity or freedom. since the u.s. has a long history of intervention, but no record of permanent occupation, i would not feel oppression is the main objective.  

the largest free trade nation, along with the largest gdp in the world wanting to expand it's economic policy on us, and including us, could only be positive. the u.s. government has no interest in, or way of simply forcing american culture on us. and has no track record of it. other nations that adopted american social culture, or "americanization" did so voluntarily, mainly through the choice of allowing american businesses and u.s. citizens to come into their nations, as free operatives.

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.