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+ # Enem 2013 Question and Answers - English Translation
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+
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+ ## Question
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+
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+ ```
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+ It is common on airplane trips to be asked to
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+ turn off devices whose operation involves the emission
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+ or reception of electromagnetic waves, such as cell phones.
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+ The justification given for this procedure is, among other
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+ things, the need to eliminate sources of electromagnetic signals
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+ that might interfere with the pilots' radio communications
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+ with the control tower.
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+ This interference will only occur if the waves
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+ emitted by the cell phone and those received by the airplane's radio
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+
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+ a) are both audible.
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+ b) have the same power.
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+ c) have the same frequency.
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+ d) have the same intensity.
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+ e) propagate at different speeds.
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+ ```
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+
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+ ## Original Solution
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+ The contents have been translated into English for broader accessibility.
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+
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+ ```
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+ Solution:
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+
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+ If the aircraft's communication equipment
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+ operates on the same frequency as cell phones,
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+ the phenomenon of interference between the
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+ radio frequencies used by these devices can occur.
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+
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+ Answer: **C**
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+ ```
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+
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+ ## Canarim-7B-VestibulAide Solution
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+
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+ ```
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+ For electromagnetic interference to occur in the airplane,
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+ there must be two electromagnetic waves with similar vibrations,
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+ but not identical, that is, there must be two waves with close frequencies.
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+
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+ Correct Answer: **C**
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+ ```