Question

Plz Write all the formulaes used in physics in chapter : Propagation of Sound Waves.

Answer 1

Explanation:

○For Class 8○:-

•Frequency = 1/Time period

•Time period=1/Frequency

•Frequency=No. of oscillation/time taken

○For Class 9○:-

•Wavelength=Distance between two consecutive crests or troughs in Transverse wave and

•Wavelength=Distance covered between two consecutive compression or rarefaction in longitudinal wave

•Or simply wavelength=distance covered in one wave motion

•Wavelength is denoted by sign λ(pronunciation is lambda)

•Velocity= λ × Frequency

•In echo cases,

Distance=(Velocity×Time taken)/2

•In a Pendulum,

Time period=2π√(L/G)