Preview only show first 10 pages with watermark. For full document please download

Halliday 2 Cap 18 - P18 044

Inserir Descrição

   EMBED

  • Rating

  • Date

    December 2018
  • Size

    60.9KB
  • Views

    3,904
  • Categories


Share

Transcript

44. (a) The number of different ways of picking up a pair of tuning forks out of a set of five is 5!/(2!3!) = 10. For each of the pairs selected, there will be one beat frequency. If these frequencies are all different from each other, we get the maximum possible number of 10. (b) First, we note that the minimum number occurs when the frequencies of these forks, labeled 1 through 5, increase in equal increments: fn = f1 + n∆f , where n = 2, 3, 4, 5. Now, there are only 4 different beat frequencies: fbeat = n∆f , where n = 1, 2, 3, 4.