13.3 Waves & Wave Properties

A fisherman fishing from a pier observes that the float on his line bobs up and down, taking 2.4 s to move from its highest point to its lowest point. He also estimates that the distance between adjacent wave crests is 48 m. What is the speed of the waves going past the pier?

• A) 1.0 m/s

• B) 20 m/s

• C) 10 m/s

• D) 5.0 m/s

A tsunami, an ocean wave generated by an earthquake, propagates along the open ocean at 700 km/hr and has a wavelength of 750 km. What is the frequency of the waves in such a tsunami?

• A) 0.93 Hz

• B) 0.00026 Hz

• C) 1.1 Hz

• D) 6.8 Hz

What is the frequency of a pressure wave of wavelength 2.5 m that is traveling at 1400 m/s?

• A) 178 Hz

• B) 1.78 kHz

• C) 560 Hz

• D) 5.6 kHz

) If a wave has a speed of 362 m/s and a period of 4.17 ms, what is its wavelength?

• A) 1510 m

• B) 1.51 m

• C) 86.8 m

• D) 86,800 m

The figure shows a "snapshot" of a wave at a given instant of time. The frequency of this wave is 120 Hz. What are the (a) amplitude, (b) wavelength, and (c) speed of this wave?

• (a) 0.10 m (b) 0.20 m (c) 24 m/s

• (a) 0.20 m (b) 0.10 m (c) 28 m/s

• (a) 0.3 m (b) 0.20 m (c) 34 m/s

The speed of sound in steel is 5000 m/s. What is the wavelength of a sound wave of frequency in steel?

• A) 7.58 m

• B) 2.41 m

• C) 1.21 m

• D) 0.829 m

Crests of an ocean wave pass a pier every If the waves are moving at what is the wavelength of the ocean waves?

• A) 56 m

• B) 28 m

• C) 64 m

• D) 48 m