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A.) The speed of sound in dry air at 20 °C is 343.5 m s-1, and...

A.) The speed of sound in dry air at 20 °C is 343.5 m s-1, and the frequency of the sound from the note D above middle C on the piano is 293.6 s-1 (according to the American standard pitch scale). Calculate the wavelength of the sound and the time it will take to travel 40.1 m across a concert hall.
Wavelength = __________ m

Time = __________ s

2.)A stretched string with fixed ends has a length of 98.1 cm.

(a) Calculate the wavelength of its fundamental mode of vibration (that is its first harmonic) and its fifth harmonic.
(b) How many nodes does the fifth harmonic have? (discounting the ends)

Wavelength first harmonic =__________ cm

Wavelength fifth harmonic = _________ cm

Number of nodes fifth harmonic = ___________

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