-- card: 40209 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 2707
-- name: #242
----- HyperTalk script -----
on openCard
  global group,rightone
  put 21 into group
  put "C" into rightone
  pass openCard
end openCard



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Question #242

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N5D05  What is the lowest frequency of electrical energy that is usually known as a radio frequency?

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20 Hz

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2,000 Hz

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20,000 Hz

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1,000,000 Hz

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Correct answer is C