Bright Tutorials Bright Tutorials
ICSE Class 10 Physics Question 3 of 20

Solved 2020 Question Paper ICSE Class 10 Physics — Question 13

Back to all questions
13
Question

Question 3(c)

A sound wave travelling in water has wavelength 0.4 m. Is this wave audible in air? (The speed of sound in water = 1400 ms-1) [2]

Answer

Given,

wavelength = 0.4 m

speed of sound in water = 1400 m s-1

As we know,

frequency of wave = SpeedWavelength\dfrac{\text{Speed}}{\text{Wavelength}}

Substituting the values we get,

frequency of wave=14000.4frequency of wave=3500 Hz=3.5 kHz\text{frequency of wave} = \dfrac{1400}{0.4} \\[0.5em] \text{frequency of wave} = 3500 \text{ Hz} = 3.5 \text{ kHz} \\[0.5em]

Hence, we get the frequency of wave = 3500 Hz and this lies in the audible range of frequency (i.e., 20 Hz to 20,000 Hz), hence it is audible.