-- card: 13109 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 2707
-- name: #238
----- HyperTalk script -----
on openCard
  global group,rightone
  put 21 into group
  put "D" into rightone
  pass openCard
end openCard



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Question #21

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N5D01  What term means the number of times per second that an alternating current flows back and forth?

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Pulse rate

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Speed

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Wavelength

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Frequency

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Correct answer is D