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The disc of a compact disc/digital audio system has an inner and outer radius for its recorded material (the Tchaikovsky and Mendelssohn violin concertos) of 2.50 cm and 5.80 cm, respectively. At playback, the disc is scanned at a constant linear speed of 130 cm/s, starting from its inner edge and moving outward. (a) If the initial angular speed of the disc is 50.0 rad/s, what is its final angular speed? (b) The spiral scan lines are 1.60 /Lm apart; what is the total length of the scan? (c) What is the playing time?

The disc of a compact disc/digital audio system has an inner and outer radius for its recorded material (the Tchaikovsky and Mendelssohn violin concertos) of 2.50 cm and 5.80 cm, respectively. At playback, the disc is scanned at a constant linear speed of 130 cm/s, starting from its inner edge and moving outward. (a) If the initial angular speed of the disc is 50.0 rad/s, what is its final angular speed? (b) The spiral scan lines are 1.60 /Lm apart; what is the total length of the scan? (c) What is the playing time?

Grade:10

1 Answers

Aditi Chauhan
askIITians Faculty 396 Points
8 years ago
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