Revision: Sound 13 Sound - Revision Quiz Test your understanding of Sound here: 1 / 5 1) Two sound waves are displayed on the cathode ray oscilloscope with the same settings. Which statement about the two sounds is correct? Sound 1 is softer and at a lower pitch than sound 2. Sound 1 is softer and at a higher pitch than sound 2. Sound 1 travels faster than sound 2. Sound 1 has a shorter wavelength than sound 2. 2 / 5 2) 2018 S4 EOY P1 Q14 The echo sounder of a ship emits a pulse of sound which is reflected back to the ship by a shoal of fish directly below the transmitter. The time between the transmission and reception of the pulse is 20 ms. At what depth are the fish from the ship if the speed of sound in sea water is 1400 m/s? 14 m 140 m 28 m 280 m 3 / 5 3) An observer hears the thunder 3.0 s after seeing a flash of lightning. If the speed of sound is approximately 330 m/s, how far was the observer from the location of the lightning? 990 m 330 m 110 m 660 m 4 / 5 4) An insect produces a sound that is not audible to typical humans. If the speed of sound is 340 m s-1, which could be the wavelength of the sound? 8.0 m 0.080 m 0.80 m 80 m 5 / 5 5) Which of the following describes ultrasound? sound waves which have a frequency greater than 20 Hz sound waves which have a frequency greater than 20 MHz sound waves which have a frequency greater than 20 kHz sound waves which have a frequency less than 20 Hz Your score is Restart quiz