Question

1. a.) A stretched string held by two students has a length of 1.5m and a mass of 0.25kg. How much tension must the two kids pull on the rope to produce waves on the string that would travel 5 m/s?

b.) With what frequency must one student shake the string to produce the first standing wave?

2. Design the length of a organ pipe, open at both ends that would produce note A (110Hz) as a fundamental frequency (v=343m/s)

3. A fisherman’s bob moves up and down 4 times a second (fish tugging on line), the ripples the disturbance is making have two crests 0.8m apart, what is the approximate speed of the ripples being created?

4. An open/closed glass tube is filled with gas rather than air, the first loud sound is produced when you raise the tube out of water at 20cm and the tuning form you use is 625Hz. Is the gas more or less elastic than air?

Answer 1