172989 Two cars moving in opposite directions approach each other with speed of $22 \mathrm{~m} / \mathrm{s}$ and $16.5 \mathrm{~m} / \mathrm{s}$ respectively. The driver of the first car blows a horn having a frequency $400 \mathrm{~Hz}$. The frequency heard by the driver of the second car is [velocity of sound $340 \mathrm{~m} / \mathrm{s}$ ]

173010 A whistle is blown from the tower of a factory with a frequency of $220 \mathrm{~Hz}$. The apparent frequency of sound heard by a worker moving towards the factory with a velocity of $30 \mathrm{~ms}^{-1}$ is (velocity of sound $=330 \mathrm{~ms}^{-1}$ )

173024 A source of sound produces waves of wavelength $60 \mathrm{~cm}$ when it is stationary. If the speed of sound in air is $320 \mathrm{~ms}^{-1}$ and source moves with speed $20 \mathrm{~ms}^{-1}$, the wavelength of sound in the forward direction will be nearest to

173028 The wavelength of light emitted from a star is 4320 A. If radius of star is $7 \times 10^{8} \mathrm{~m}$ and period of its rotational motion is 22 days, the Doppler's displacement will be

173077 A car with a horn of frequency $620 \mathrm{~Hz}$, travels towards a large wall with a speed $20 \mathrm{~ms}^{-1}$. If velocity of sound is $330 \mathrm{~ms}^{-1}$ the frequency of echo of sound of horn as heard by driver

172989 Two cars moving in opposite directions approach each other with speed of $22 \mathrm{~m} / \mathrm{s}$ and $16.5 \mathrm{~m} / \mathrm{s}$ respectively. The driver of the first car blows a horn having a frequency $400 \mathrm{~Hz}$. The frequency heard by the driver of the second car is [velocity of sound $340 \mathrm{~m} / \mathrm{s}$ ]

173010 A whistle is blown from the tower of a factory with a frequency of $220 \mathrm{~Hz}$. The apparent frequency of sound heard by a worker moving towards the factory with a velocity of $30 \mathrm{~ms}^{-1}$ is (velocity of sound $=330 \mathrm{~ms}^{-1}$ )

173024 A source of sound produces waves of wavelength $60 \mathrm{~cm}$ when it is stationary. If the speed of sound in air is $320 \mathrm{~ms}^{-1}$ and source moves with speed $20 \mathrm{~ms}^{-1}$, the wavelength of sound in the forward direction will be nearest to

173028 The wavelength of light emitted from a star is 4320 A. If radius of star is $7 \times 10^{8} \mathrm{~m}$ and period of its rotational motion is 22 days, the Doppler's displacement will be

173077 A car with a horn of frequency $620 \mathrm{~Hz}$, travels towards a large wall with a speed $20 \mathrm{~ms}^{-1}$. If velocity of sound is $330 \mathrm{~ms}^{-1}$ the frequency of echo of sound of horn as heard by driver

172989 Two cars moving in opposite directions approach each other with speed of $22 \mathrm{~m} / \mathrm{s}$ and $16.5 \mathrm{~m} / \mathrm{s}$ respectively. The driver of the first car blows a horn having a frequency $400 \mathrm{~Hz}$. The frequency heard by the driver of the second car is [velocity of sound $340 \mathrm{~m} / \mathrm{s}$ ]

173010 A whistle is blown from the tower of a factory with a frequency of $220 \mathrm{~Hz}$. The apparent frequency of sound heard by a worker moving towards the factory with a velocity of $30 \mathrm{~ms}^{-1}$ is (velocity of sound $=330 \mathrm{~ms}^{-1}$ )

173024 A source of sound produces waves of wavelength $60 \mathrm{~cm}$ when it is stationary. If the speed of sound in air is $320 \mathrm{~ms}^{-1}$ and source moves with speed $20 \mathrm{~ms}^{-1}$, the wavelength of sound in the forward direction will be nearest to

173028 The wavelength of light emitted from a star is 4320 A. If radius of star is $7 \times 10^{8} \mathrm{~m}$ and period of its rotational motion is 22 days, the Doppler's displacement will be

173077 A car with a horn of frequency $620 \mathrm{~Hz}$, travels towards a large wall with a speed $20 \mathrm{~ms}^{-1}$. If velocity of sound is $330 \mathrm{~ms}^{-1}$ the frequency of echo of sound of horn as heard by driver

172989 Two cars moving in opposite directions approach each other with speed of $22 \mathrm{~m} / \mathrm{s}$ and $16.5 \mathrm{~m} / \mathrm{s}$ respectively. The driver of the first car blows a horn having a frequency $400 \mathrm{~Hz}$. The frequency heard by the driver of the second car is [velocity of sound $340 \mathrm{~m} / \mathrm{s}$ ]

173010 A whistle is blown from the tower of a factory with a frequency of $220 \mathrm{~Hz}$. The apparent frequency of sound heard by a worker moving towards the factory with a velocity of $30 \mathrm{~ms}^{-1}$ is (velocity of sound $=330 \mathrm{~ms}^{-1}$ )

173024 A source of sound produces waves of wavelength $60 \mathrm{~cm}$ when it is stationary. If the speed of sound in air is $320 \mathrm{~ms}^{-1}$ and source moves with speed $20 \mathrm{~ms}^{-1}$, the wavelength of sound in the forward direction will be nearest to

173028 The wavelength of light emitted from a star is 4320 A. If radius of star is $7 \times 10^{8} \mathrm{~m}$ and period of its rotational motion is 22 days, the Doppler's displacement will be

173077 A car with a horn of frequency $620 \mathrm{~Hz}$, travels towards a large wall with a speed $20 \mathrm{~ms}^{-1}$. If velocity of sound is $330 \mathrm{~ms}^{-1}$ the frequency of echo of sound of horn as heard by driver

172989 Two cars moving in opposite directions approach each other with speed of $22 \mathrm{~m} / \mathrm{s}$ and $16.5 \mathrm{~m} / \mathrm{s}$ respectively. The driver of the first car blows a horn having a frequency $400 \mathrm{~Hz}$. The frequency heard by the driver of the second car is [velocity of sound $340 \mathrm{~m} / \mathrm{s}$ ]

173010 A whistle is blown from the tower of a factory with a frequency of $220 \mathrm{~Hz}$. The apparent frequency of sound heard by a worker moving towards the factory with a velocity of $30 \mathrm{~ms}^{-1}$ is (velocity of sound $=330 \mathrm{~ms}^{-1}$ )

173024 A source of sound produces waves of wavelength $60 \mathrm{~cm}$ when it is stationary. If the speed of sound in air is $320 \mathrm{~ms}^{-1}$ and source moves with speed $20 \mathrm{~ms}^{-1}$, the wavelength of sound in the forward direction will be nearest to

173028 The wavelength of light emitted from a star is 4320 A. If radius of star is $7 \times 10^{8} \mathrm{~m}$ and period of its rotational motion is 22 days, the Doppler's displacement will be

173077 A car with a horn of frequency $620 \mathrm{~Hz}$, travels towards a large wall with a speed $20 \mathrm{~ms}^{-1}$. If velocity of sound is $330 \mathrm{~ms}^{-1}$ the frequency of echo of sound of horn as heard by driver