If the velocity of sound in air is 350 m s⁻¹, a person singing a note of 250 cycles per second is producing sound waves with a wavelength of

The correct answer is (b) 1.4 m.
The wavelength (λ) is calculated using the formula: λ = v/f
where v = 350 m/s (velocity of sound) and f = 250 Hz (frequency).
λ = 350/250 = 1.4m.
Class 9th Science NCERT MCQ Questions
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