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27 Aug 2019, 01:50
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
70% (01:52) correct
30%
(02:05)
wrong
based on 243
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Scientist: Our antenna has located a new signal. This signal may be from space, or it might be the result of interference from equipment on Earth. In order to determine which it is, we plan to test this signal by slightly changing the orientation of our antenna. Much as a searchlight beam falls off in intensity near its edges, so too does the sensitivity of an antenna decrease when a transmitting target is not exactly centered. If the signal intensity increases or decreases, then we have evidence that the signal is from space.
The scientist’s plan assumes that
A. the antenna is currently oriented to the center of the transmitting target
B. the intensity of signals produced by interference on Earth remains constant when an antenna’s orientation is slightly adjusted
C. adjusting the antenna orientation is the test most likely to eliminate the possibility of Earth-based interference
D. Earth-based interference is likely to appear as if it were being transmitted from several specific locations at once
E. signal transmissions from space are less intense than Earth-based interference
The scientist’s plan assumes that
A. the antenna is currently oriented to the center of the transmitting target
B. the intensity of signals produced by interference on Earth remains constant when an antenna’s orientation is slightly adjusted
C. adjusting the antenna orientation is the test most likely to eliminate the possibility of Earth-based interference
D. Earth-based interference is likely to appear as if it were being transmitted from several specific locations at once
E. signal transmissions from space are less intense than Earth-based interference
27 Aug 2019, 04:07
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Bunuel
Scientist: Our antenna has located a new signal. This signal may be from space, or it might be the result of interference from equipment on Earth. In order to determine which it is, we plan to test this signal by slightly changing the orientation of our antenna. Much as a searchlight beam falls off in intensity near its edges, so too does the sensitivity of an antenna decrease when a transmitting target is not exactly centered. If the signal intensity increases or decreases, then we have evidence that the signal is from space.
The scientist’s plan assumes that
The scientist’s plan assumes that
Break down argument:
Orientation change -> If Intensity change, then from space
Prethink:
Intensity doesn't change if from earth
Only (B) fits the criteria.
A. the antenna is currently oriented to the center of the transmitting target
B. the intensity of signals produced by interference on Earth remains constant when an antenna’s orientation is slightly adjusted
C. adjusting the antenna orientation is the test most likely to eliminate the possibility of Earth-based interference
D. Earth-based interference is likely to appear as if it were being transmitted from several specific locations at once
E. signal transmissions from space are less intense than Earth-based interference
27 Aug 2019, 07:11
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B is the right answer because if we negate this then it would not be beneficial to find out the actual reason.
