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The amount of signal received from a distant transmission source is essentially geometric in nature due to the inverse square law, and this leads to the concept of effective area. This measures the performance of an antenna by comparing the amount of power it generates to the amount of power in the original signal, measured in terms of the signal's power density in Watts per square metre. A half-wave dipole has an effective area of 0.13 2. If more performance is needed, one cannot simply make the antenna larger. Although this would intercept more energy from the signal, due to the considerations above, it would decrease the output significantly due to it moving away from the resonant length. In roles where higher performance is needed, designers often use multiple elements combined together.

What type of project would call for more than one element used together?
Answer: higher performance
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The CIA had different demands placed on it by the different bodies overseeing it. Truman wanted a centralized group to organize the information that reached him, the Department of Defense wanted military intelligence and covert action, and the State Department wanted to create global political change favorable to the US. Thus the two areas of responsibility for the CIA were covert action and covert intelligence. One of the main targets for intelligence gathering was the Soviet Union, which had also been a priority of the CIA's predecessors.

Who wanted the CIA to have a central group that organized information for him?
Answer: Truman
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In the months before the attack on Pearl Harbor, Kwajalein Atoll was the administrative center of the Japanese 6th Fleet Forces Service, whose task was the defense of the Marshall Islands.

On what atoll was the 6th Fleet Forces Service based?
Answer:
Kwajalein