Beyond the Basics

  1. 77.

    1. 26 dB; 18 dB; 12 dB; 6 dB

    2. 200 ft

    3. a=10(4+log 4)46; b=20

    4. r=20010L/20

  2. 79. 5×1015 vs 2.5×1016; earthquake is 5 times more powerful.

  3. 81. [875, 885] Hz

  4. 83. 2.2

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