In the figure, S is a small loudspeaker driven by an audio oscillator and amplifier, adjustable in frequency from 540 to 2400 Hz only. Tube D is a piece of cylindrical sheet-metal pipe 55.3 cm long and open at both ends. (a) If the speed of sound in air is 344 m/s at the existing temperature, at how many frequencies will a resonance occur in the pipe when the frequency emitted by the speaker is varied from 540 Hz to 2400 Hz? (b) What is the lowest resonant frequency in the given interval? D (a) Number i Units (b) Number i Units

In the figure, S is a small loudspeaker driven by an audio oscillator and amplifier, adjustable in frequency from 540 to 2400 Hz only. Tube D is a piece of cylindrical sheet-metal pipe 55.3 cm long and open at both ends. (a) If the speed of sound in air is 344 m/s at the existing temperature, at how many frequencies will a resonance occur in the pipe when the frequency emitted by the speaker is varied from 540 Hz to 2400 Hz? (b) What is the lowest resonant frequency in the given interval? D (a) Number i Units (b) Number i Units