172976 A motor cycle starts from rest from a stationary source of sound and moves away from the source with a uniform acceleration 2 $\mathrm{ms}^{-2}$. Distance travelled by the motor cycle when the person on it hears the sound of frequency which is $94 \%$ of the true frequency, is nearly (speed of sound in air $=330 \mathrm{~ms}^{-1}$ )
172977
A stationary source (see figure) emits sound waves of frequency $f$ towards a stationary wall. If an observer moving with speed $u$ in a direction perpendicular to the wall measures a frequency $f^{\prime}=\frac{11}{8} f$ at the instant shown, then $u$ is related to the speed of sound $v_{s}$ as
172979 A rocket is moving at a speed of $200 \mathrm{~ms}^{-1}$ towards a stationary target. While moving it emits a wave of frequency $1000 \mathrm{~Hz}$. Some of the sound reaching the target gets reflected back to the rocket as an echo. The frequency of the echo as detected by the rocket is (velocity of sound $=330 \mathrm{~ms}^{-1}$ )
172976 A motor cycle starts from rest from a stationary source of sound and moves away from the source with a uniform acceleration 2 $\mathrm{ms}^{-2}$. Distance travelled by the motor cycle when the person on it hears the sound of frequency which is $94 \%$ of the true frequency, is nearly (speed of sound in air $=330 \mathrm{~ms}^{-1}$ )
172977
A stationary source (see figure) emits sound waves of frequency $f$ towards a stationary wall. If an observer moving with speed $u$ in a direction perpendicular to the wall measures a frequency $f^{\prime}=\frac{11}{8} f$ at the instant shown, then $u$ is related to the speed of sound $v_{s}$ as
172979 A rocket is moving at a speed of $200 \mathrm{~ms}^{-1}$ towards a stationary target. While moving it emits a wave of frequency $1000 \mathrm{~Hz}$. Some of the sound reaching the target gets reflected back to the rocket as an echo. The frequency of the echo as detected by the rocket is (velocity of sound $=330 \mathrm{~ms}^{-1}$ )
172976 A motor cycle starts from rest from a stationary source of sound and moves away from the source with a uniform acceleration 2 $\mathrm{ms}^{-2}$. Distance travelled by the motor cycle when the person on it hears the sound of frequency which is $94 \%$ of the true frequency, is nearly (speed of sound in air $=330 \mathrm{~ms}^{-1}$ )
172977
A stationary source (see figure) emits sound waves of frequency $f$ towards a stationary wall. If an observer moving with speed $u$ in a direction perpendicular to the wall measures a frequency $f^{\prime}=\frac{11}{8} f$ at the instant shown, then $u$ is related to the speed of sound $v_{s}$ as
172979 A rocket is moving at a speed of $200 \mathrm{~ms}^{-1}$ towards a stationary target. While moving it emits a wave of frequency $1000 \mathrm{~Hz}$. Some of the sound reaching the target gets reflected back to the rocket as an echo. The frequency of the echo as detected by the rocket is (velocity of sound $=330 \mathrm{~ms}^{-1}$ )
172976 A motor cycle starts from rest from a stationary source of sound and moves away from the source with a uniform acceleration 2 $\mathrm{ms}^{-2}$. Distance travelled by the motor cycle when the person on it hears the sound of frequency which is $94 \%$ of the true frequency, is nearly (speed of sound in air $=330 \mathrm{~ms}^{-1}$ )
172977
A stationary source (see figure) emits sound waves of frequency $f$ towards a stationary wall. If an observer moving with speed $u$ in a direction perpendicular to the wall measures a frequency $f^{\prime}=\frac{11}{8} f$ at the instant shown, then $u$ is related to the speed of sound $v_{s}$ as
172979 A rocket is moving at a speed of $200 \mathrm{~ms}^{-1}$ towards a stationary target. While moving it emits a wave of frequency $1000 \mathrm{~Hz}$. Some of the sound reaching the target gets reflected back to the rocket as an echo. The frequency of the echo as detected by the rocket is (velocity of sound $=330 \mathrm{~ms}^{-1}$ )
172976 A motor cycle starts from rest from a stationary source of sound and moves away from the source with a uniform acceleration 2 $\mathrm{ms}^{-2}$. Distance travelled by the motor cycle when the person on it hears the sound of frequency which is $94 \%$ of the true frequency, is nearly (speed of sound in air $=330 \mathrm{~ms}^{-1}$ )
172977
A stationary source (see figure) emits sound waves of frequency $f$ towards a stationary wall. If an observer moving with speed $u$ in a direction perpendicular to the wall measures a frequency $f^{\prime}=\frac{11}{8} f$ at the instant shown, then $u$ is related to the speed of sound $v_{s}$ as
172979 A rocket is moving at a speed of $200 \mathrm{~ms}^{-1}$ towards a stationary target. While moving it emits a wave of frequency $1000 \mathrm{~Hz}$. Some of the sound reaching the target gets reflected back to the rocket as an echo. The frequency of the echo as detected by the rocket is (velocity of sound $=330 \mathrm{~ms}^{-1}$ )