Question

1. Why does a vibrating string on a guitar or violin sound louder when placed on the instrument than it would if were left alone to vibrate in the air while off the instrument?

2. One evening, I was walking around my neighbourhood and the temperature was 14C. An

explosion occurred at a distance of 6.00 km from me. How long after the explosion do I hear it?

3. An automobile is moving at 30.0 m/s and is driving towards a whistle that indicates it is

lunch time at a factory; the whistle has a frequency of 50 Hz.

Answer 1

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