Easy
When an aeroplane attains a speed higher than the velocity of sound in air,a loud bang is heard. This is because
- AIt explodes
- BIt produces a shock wave which is received as the bang
- CIts wings vibrate so violently that the bang is heard
- DThe normal engine noises undergo a Doppler shift to generate the bang
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Similar Questions
$A$ bat emits ultrasonic sound of frequency $1000 \; kHz$ in air. If the sound meets a water surface,what is the wavelength of
$(a)$ the reflected sound,
$(b)$ the transmitted sound?
Speed of sound in air is $340 \; m/s$ and in water is $1486 \; m/s$.
$(a)$ the reflected sound,
$(b)$ the transmitted sound?
Speed of sound in air is $340 \; m/s$ and in water is $1486 \; m/s$.
Medium
View SolutionRegarding the speed of sound in a gas, match the following:
$A$. Temperature of gas is made $4$ times and pressure $2$ times $P$. Speed becomes $2\sqrt{2}$ times $B$. Only pressure is made $4$ times without change in temperature $Q$. Speed becomes $2$ times $C$. Only temperature is changed to $4$ times $R$. Speed remains unchanged $D$. Molecular mass of the gas is made $4$ times $S$. Speed becomes half
| $A$. Temperature of gas is made $4$ times and pressure $2$ times | $P$. Speed becomes $2\sqrt{2}$ times |
| $B$. Only pressure is made $4$ times without change in temperature | $Q$. Speed becomes $2$ times |
| $C$. Only temperature is changed to $4$ times | $R$. Speed remains unchanged |
| $D$. Molecular mass of the gas is made $4$ times | $S$. Speed becomes half |
Medium
View SolutionThe following phenomenon cannot be observed for sound waves:
Easy
View SolutionWhen sound waves travel from air to water,which of the following remains constant?
Easy
View SolutionThe speed of sound in oxygen $(O_2)$ at a certain temperature is $460 \,ms^{-1}$. The speed of sound in helium $(He)$ at the same temperature will be (assume both gases to be ideal): (in $\,ms^{-1}$)
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