By international agreement most orchestras tune to a frequency of 440 Hz, called A440. (a) Given that the speed of sound in air at room temperature is 343.9 m/s, what is the wavelength of A440? (1 mark) (b) What would the wavelength be if a frequency of 100 Hz is used? (1 mark) (c) Imagine that 10 identical violins are each about to play some tone at 70 dB. Describe how the sound intensity changes as each violin joins in, one at a time. What would the sound intensity level be when all ten violins have joined in