The speed of sound in air at NTP is 330 m/s.
The period of sound wave of wavelength 66 cm is …………………
(A) 0.2 s
(B) 0.1
(C) 0.1 × 10-2 s
(D) 0.2 × 10-2 s
1 Answers
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A tuning fork of frequency 170 Hz produces sound waves of wavelength 2m. Calculate speed of sound.
Given : n = 170 Hz, λ = 2 m To find : velocity of sound (v) Formula : v = nλ Calculation : From formula, v = 170 × 2 ∴ v = 340...
2 Answers 4 views
i. What type of wave is a sound wave? ii. Can sound travel in vacuum?
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Correct Answer - 60 cm
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A bat emits ultrasonic sound of frequency 1000 kHz in air. If the sound meets a water surface, what is the wavelength
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2 Answers 1 views
The wavelength of a sound note is 1 m in air and 2.5 m in a liquid. Find the speed of sound in the liquid, if the speed
Given: λa = 1 m, λl = 2.5 m, va = 330 m/s, To find: Speed of sound (vl) Formula: v = nλ Calculation: From formula, Since the frequency n remains the same, va = nλa and vl = nλl ∴ \(\frac{v_l}{v_a}=\frac{λ_l}{λ_a}\) ∴ vl = va \(\frac{λ_l}{λ_a}\) =...
2 Answers 2 views
The velocity of sound in air at 27 °C is 340 m/s. Calculate the velocity of sound in air at 127 °C.
Given: T1 = 27 °C = 27 + 273 = 300 K, v1 = 340 m/s, T2 = 127 °C = 127 + 273 = 400 K To find: Velocity (v2) Formula: \(\frac{v_1}{v_2}=\sqrt{\frac{T_1}{T_2}}\) Calculation: From formula, v2 = v1 \(\sqrt{\frac{T_2}{T_1}}\) = 340, \(\sqrt{\frac{400}{300}}\) =...
2 Answers 1 views
The velocity of sound in air at NTP is 330 m/s. What will be its value when temperature is doubled and pressure is halved?
Correct option is: (D) \(\frac{330}{\sqrt{2}}\) m/s
2 Answers 1 views
The wavelength of sound in air is 1.5 m and that in liquid is 2 m. If the velocity of sound in air is 330 m/s, the velocity of sound in liquid is
Correct option is: (B) 440 m/’s
2 Answers 6 views
A sound note emitted from a certain source has a velocity of 300 m/s in air and 1050 m/s in water. If the wavelength of sound note in air is 2 m
Correct option is: (C) 7 m
2 Answers 1 views
When a sound wave travels in air …………….. and ……………… of air at a place varies.
C) density, pressure
2 Answers 1 views