The speed of sound in a medium is $$v$$. If the density of the medium is doubled at constant pressure, what will be the new speed of sound?

 1 $$\sqrt{2} v$$ 2 $$v$$ 3 $$\frac{v}{\sqrt{2}}$$ 4 $$2v$$
Subtopic:  Speed of Sound |
78%
From NCERT
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A transverse wave moves from a medium $$A$$ to a medium $$B$$. In medium $$A$$, the velocity of the transverse wave is $$500~\text{ms}^{-1}$$ and the wavelength is $$5~\text{m}$$. The frequency and the wavelength of the wave in medium $$B$$ when its velocity is $$600~\text{ms}^{-1}$$, respectively are:

 1 $$120~\text{Hz}$$ and $$5~\text{m}$$ 2 $$100~\text{Hz}$$ and $$5~\text{m}$$ 3 $$120~\text{Hz}$$ and $$5~\text{m}$$ 4 $$100~\text{Hz}$$ and $$6~\text{m}$$
Subtopic:  Speed of Sound |
80%
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Sound waves travel at $$350$$ m/s through warm air and at $$3500$$ m/s through brass. The wavelength of a $$700$$ Hz acoustic wave as it enters brass from warm air:

 1 increase by a factor of $$20$$ 2 increase by a factor of $$10$$ 3 decrease by a factor of $$20$$ 4 decrease by a factor of $$10$$
Subtopic:  Speed of Sound |
77%
From NCERT
AIPMT - 2011
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A person standing between two parallel hills fires a gun and hears the first echo after ${\mathrm{t}}_{1}$ sec and the second echo after ${\mathrm{t}}_{2}$ sec. The distance between the two hills is: [Given: Speed of sound = v]

$1.$ $\frac{\mathrm{v}\left({\mathrm{t}}_{1}-{\mathrm{t}}_{2}\right)}{2}$
$2.$ $\frac{\mathrm{v}\left({\mathrm{t}}_{1}{\mathrm{t}}_{2}\right)}{2\left({\mathrm{t}}_{1}+{\mathrm{t}}_{2}\right)}$
$3.$ $\mathrm{v}\left({\mathrm{t}}_{1}+{\mathrm{t}}_{2}\right)$
$4.$ $\frac{\mathrm{v}\left({\mathrm{t}}_{1}+{\mathrm{t}}_{2}\right)}{2}$

Subtopic:  Speed of Sound |
55%
From NCERT
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A bat emits an ultrasonic sound of frequency $$1000$$ kHz in the air. If the sound meets a water surface, what is the wavelength of the reflected sound? (The speed of sound in air is $$340$$ m/sec and in water is $$1486$$ m/sec)
1. $$3.4 \times 10^{-4}~\text{m}$$
2. $$1 . 49 \times 10^{- 3} ~ \text{m}$$
3. $$2 . 34 \times 10^{- 2} ~\text{m}$$
4. $$1 . 73 \times10^{- 3} ~\text{m}$$

Subtopic:  Speed of Sound |
55%
From NCERT
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The speed of sound at a constant temperature depends on:

 1 Pressure 2 Density of gas 3 Above both 4 None of the above
Subtopic:  Speed of Sound |
54%
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The velocity of sound in air is:

 1 faster in dry air than in moist air. 2 directly proportional to the pressure. 3 directly proportional to temperature. 4 independent of the pressure of air.

Subtopic:  Speed of Sound |
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A tuning fork with a frequency of $$800$$ Hz produces resonance in a resonance column tube with the upper end open and the lower end closed by the water surface. Successive resonances are observed at lengths of $$9.75$$ cm, $$31.25$$ cm, and $$52.75$$ cm. The speed of the sound in the air is:

 1 $$500$$ m/s 2 $$156$$ m/s 3 $$344$$ m/s 4 $$172$$ m/s
Subtopic:  Speed of Sound |
74%
From NCERT
NEET - 2019
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