The questions below refer to this figure:

Express your answer using two significant figures and with appropriate units.

a. What is the amplitude of the traveling wave in the figure?

b. What is the wavelength of the traveling wave in the figure?

c. What is the frequency of the traveling wave in the figure?

d. What is the phase constant of the traveling wave in the figure? (Express your answer in radians in terms of constant π.)

2. Rank in order, from largest to smallest, the wavelengths λa, λb, and λc for sound waves having frequencies fa=100Hz, fb =1000Hz, and fc =10,000Hz.

3. As you stand by the side of the road, a car approaches you at a constant speed, sounding its horn, and you hear a frequency of 80.0 Hz. After the car goes by, you hear a frequency of 60.0 Hz. What is the speed of the car? The speed of sound in the air is 343 m/s.

i. 16.0 m/s

ii. 36.0 m/s

iii. 25.0 m/s

iv. 49.0 m/s

64.0 m/s

4.Two loudspeakers on elevated platforms are at opposite ends of a field. Each broadcasts equally in all directions. The sound intensity level at a point halfway between the loudspeakers is 75.1 dB. What is the sound intensity level at a point one-quarter of the way from one speaker to the other along the line joining them?

Problem text and figures Items 01 – 04 © 2013 Pearson Education, Inc.

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