Revision: Sound 13 Sound - Revision Quiz Test your understanding of Sound here: 1 / 5 1) The pitch of a sound is determined by its frequency amplitude speed wavelength 2 / 5 2) A circular disc has 100 holes. It rotates at 300 revolutions per minute and air is blown across the holes. What is the frequency of the sound produced? 180 Hz 20 Hz 300 Hz 500 Hz 3 / 5 3) The following shows the displacement-distance graph for a wave. What is the wavelength if the wave? 0.15 m 0.05 m 0.10 m 0.20 m 4 / 5 4) A man standing at P in the middle of a rectangular-shaped room claps his hands once. A microphone placed right next to him detects two distinct echoes. Taking the speed of sound in air to be 340 m s-1, what is the time interval between the two echoes? 59 ms 32 ms 120 ms 26 ms 5 / 5 5) A musical note of wavelength λ has a velocity of v and a frequency of ƒ in air. What will be the frequency and velocity of another musical note of wavelength 2λ in air? frequency: 2ƒ velocity: 2v frequency: ƒ/2 velocity: 2v frequency: ƒ/2 velocity: v frequency: 2ƒ velocity: v Your score is Restart quiz