Sound And Waves - SS1 Physics Past Questions and Answers - page 2

The speed of sound in a medium depends on the properties of that medium, primarily its density and elasticity. In general, sound travels faster in denser and more elastic media. For example, sound travels faster in solids than in liquids, and faster in liquids than in gases. The speed of sound in air at room temperature is approximately 340 meters per second. However, the speed of sound can vary slightly depending on factors such as temperature, humidity, and pressure.

Pitch refers to the subjective perception of how high or low a sound appears to be. It is closely related to the frequency of a sound wave. The frequency of a sound wave represents the number of vibrations or cycles per second and is measured in hertz (Hz). Higher-frequency sound waves have a higher pitch, giving the perception of a higher musical note. Conversely, lower-frequency sound waves have a lower pitch, corresponding to a lower musical note.

The amplitude of a sound wave refers to the maximum displacement of particles in the medium caused by the wave. It represents the intensity or energy of the sound wave. The perceived loudness of a sound is directly related to the amplitude of the sound wave. Higher-amplitude sound waves create more significant displacements of particles and result in a greater sensation of loudness. In contrast, lower-amplitude sound waves produce quieter sounds.