Question

4. define sound state any two examples which tells us
quality a characteristic of sound useful to us.​

Answer 1

Answer:

Sound is a longitudinal wave which consists of compressions and rarefactions travelling through a medium. Sound wave can be described by five characteristics: Wavelength, Amplitude, Time-Period, Frequency and Velocity or Speed. The minimum distance in which a sound wave repeats itself is called its wavelength

Explanation:There are five main characteristics of sound waves: wavelength, amplitude, frequency, time period, and velocity. The wavelength of a sound wave indicates the distance that wave travels before it repeats itself. The wavelength itself is a longitudinal wave that shows the compressions and rarefactions of the sound wave.

Answer 2

The two most important properties of sound are amplitude and frequency because amplitude determines the loudness of sound and frequency determines its pitch.