The correct answer is - 45 percent.
Since the clock produces 45 useful unites energy units for every 100 unites of energy that it uses, than it turns out that the efficiency of the clock is 45 percent.
Those living in a nation-state are often expected to do all of the following except defend the nation from detractors. Thus option (C) is correct.
<h3>What do you mean by Nation?</h3>
Nation refers to the territory where the people and live and they are governed by the same government. The example of the nation is United States, India, United Kingdom etc are the nations.
The people those are living in the nation are expected to spread the cultures and their norms, speak their national as well as the regional languages.
They are not required to the defend the nation from the detractors. Thus option (C) is correct.
Learn more about nationalism here:
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The countries that are located on the equator out of this list are:
Somalia
Democratic Republic of the Congo
Uganda
NOT LOCATED ON EQUATOR: Libya that is located in northern africa
The answer is D. Exosphere
Exosphere is the outermost Layer of the Atmosphere that goes out about 500 - 10,000 Km in altitude.
It's the place where satellites and the space shuttle orbit the earth. Because it's difficult to define the boundary between exosphere and the outer space, exosphere may be considered as a part of outer space