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card_38901.txt
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Text File
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1991-04-12
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1KB
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42 lines
-- card: 38901 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 2707
-- name: #265
----- HyperTalk script -----
on openCard
global group,rightone
put 21 into group
put "B" into rightone
pass openCard
end openCard
-- part contents for background part 20
----- text -----
Question #21
-- part contents for background part 1
----- text -----
2E-12-4.2 Why do we call signals in the range 20 Hz to 20,000 Hz "audio frequencies"?
-- part contents for background part 11
----- text -----
Because the human ear rejects signals in this frequency range
-- part contents for background part 27
----- text -----
Because the human ear responds to sounds in this frequency range
-- part contents for background part 28
----- text -----
Because frequencies in this range are too low for a radio to detect
-- part contents for background part 29
----- text -----
Because a radio converts signals in this range directly to sounds the human ear responds to
-- part contents for background part 43
----- text -----
Correct answer is B