The World Today - Comment

 

Question 1143: According to the Nyquist-Shannon theory:
Author: Bill Donovan - Category: Technology
Difficulty: 4/5 - Zone: World

  • to double an amplifier's loudness, you must quadruple the power supplied
  • doubling the density of a medium halves the speed of sound through that medium
  • to capture a signal, the sample frequency must be at least double the signal frequency
  • any telephone or telegraph system based on wires requires at least two of them

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