Q1. A musical instrument produces a sound wave with a wavelength of 0.66 m and a speed of 300 m/s in air. The sound wave enters water whereupon its velocity changes to 1500 m/s. Calculate the new wavelength of the sound wave.


Q2. A sound wave with a wavelength of 3.3 m travels through concrete at 3300 m/s. When the sound wave leaves the concrete it passes into a steel beam whereupon it wavelength increases to 6 m. From this information calculate the speed of the sound wave as it is passing through the steel beam.


Q3. A musical instrument produces a sound wave with a frequency of 1000 Hz.  The sound wave has a wavelength of 0.34 m in air.  Calculate the speed of the sound wave in air. 


 

Q4. In water the speed of sound is different.  The speed of a sound wave in water is 1300 m/s. The sound  wave has a frequency of 1000Hz.  Calculate the wavelength of this sound wave. 


Q5. The diagram shows a ship using an Echo locator (SONAR) to find a submarine. The pulsed wave is transmitted from the ship, which is then reflected off the top of the sub and is then picked up by the receiver. 


Given that the speed of sound in water is 1300 m/s and the frequency of the SONAR pulse is set at 500 Hz, what is the depth of the submarine if the pulse "round trip" is 0.2s ?

 





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