You would definitely not expect political stability in a state that is being annexed or which does not have a territory - rather the opposite would be true.
Both multinational and souvereign states can have a high lever of political security. However, in a multinational state one can also expect some conflicts between the different ethnic groups - therefore the best answer is "a sovereign state"
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Power is a function of voltage times the volume of electrons (current). Power is the ability to do work and is measured in Watts. The higher the voltage the more power you have with the same current.
The correct answer is - Of its mountain ranges, the Urals are the highest.
This is the statement that is not accurate, the Urals are not the highest mountain range in Russia, there's multiple mountains that are much higher than the Urals. In fact, the Urals are not even a mountain range that falls into the category of high mountain, but in a medium height mountain range.
Even though the height is not recognizable for the Urals, their trademark is their length, they are the longest mountain range in Russia.
