173056 A source is moving towards observer with a speed of $20 \mathrm{~ms}^{-1}$ and having frequency $240 \mathrm{~Hz}$ and observer is moving towards source with a velocity of $20 \mathrm{~ms}^{-1}$. What is the apparent frequency heard by observer, If velocity of sound is $340 \mathrm{~ms}^{-1}$ ?

173057 If a source emitting waves of frequency $f$ moves towards an observer with a velocity $\frac{v}{4}$ and the observer moves away from the source with a velocity $v / 6$, the apparent frequency as heard by the observer will be (where, $v=$ velocity of sound)

173058 The pitch of the whistle of an engine appears to drop to $\left(\frac{5}{6}\right)^{\text {th }}$ of original value when it passes a stationary observer. If the speed of sound in air is $350 \mathrm{~m} / \mathrm{s}$ then the speed of engine is

173059 A train is approaching with velocity $25 \mathrm{~m} / \mathrm{s}$ towards a pedestrian standing on the track, frequency of horn of train is $1 \mathrm{kHz}$. Frequency heard by the pedestrian is $(\mathrm{v}=350 \mathrm{~m} / \mathrm{s})$

173056 A source is moving towards observer with a speed of $20 \mathrm{~ms}^{-1}$ and having frequency $240 \mathrm{~Hz}$ and observer is moving towards source with a velocity of $20 \mathrm{~ms}^{-1}$. What is the apparent frequency heard by observer, If velocity of sound is $340 \mathrm{~ms}^{-1}$ ?

173057 If a source emitting waves of frequency $f$ moves towards an observer with a velocity $\frac{v}{4}$ and the observer moves away from the source with a velocity $v / 6$, the apparent frequency as heard by the observer will be (where, $v=$ velocity of sound)

173058 The pitch of the whistle of an engine appears to drop to $\left(\frac{5}{6}\right)^{\text {th }}$ of original value when it passes a stationary observer. If the speed of sound in air is $350 \mathrm{~m} / \mathrm{s}$ then the speed of engine is

173059 A train is approaching with velocity $25 \mathrm{~m} / \mathrm{s}$ towards a pedestrian standing on the track, frequency of horn of train is $1 \mathrm{kHz}$. Frequency heard by the pedestrian is $(\mathrm{v}=350 \mathrm{~m} / \mathrm{s})$

173056 A source is moving towards observer with a speed of $20 \mathrm{~ms}^{-1}$ and having frequency $240 \mathrm{~Hz}$ and observer is moving towards source with a velocity of $20 \mathrm{~ms}^{-1}$. What is the apparent frequency heard by observer, If velocity of sound is $340 \mathrm{~ms}^{-1}$ ?

173057 If a source emitting waves of frequency $f$ moves towards an observer with a velocity $\frac{v}{4}$ and the observer moves away from the source with a velocity $v / 6$, the apparent frequency as heard by the observer will be (where, $v=$ velocity of sound)

173058 The pitch of the whistle of an engine appears to drop to $\left(\frac{5}{6}\right)^{\text {th }}$ of original value when it passes a stationary observer. If the speed of sound in air is $350 \mathrm{~m} / \mathrm{s}$ then the speed of engine is

173059 A train is approaching with velocity $25 \mathrm{~m} / \mathrm{s}$ towards a pedestrian standing on the track, frequency of horn of train is $1 \mathrm{kHz}$. Frequency heard by the pedestrian is $(\mathrm{v}=350 \mathrm{~m} / \mathrm{s})$

173056 A source is moving towards observer with a speed of $20 \mathrm{~ms}^{-1}$ and having frequency $240 \mathrm{~Hz}$ and observer is moving towards source with a velocity of $20 \mathrm{~ms}^{-1}$. What is the apparent frequency heard by observer, If velocity of sound is $340 \mathrm{~ms}^{-1}$ ?

173057 If a source emitting waves of frequency $f$ moves towards an observer with a velocity $\frac{v}{4}$ and the observer moves away from the source with a velocity $v / 6$, the apparent frequency as heard by the observer will be (where, $v=$ velocity of sound)

173058 The pitch of the whistle of an engine appears to drop to $\left(\frac{5}{6}\right)^{\text {th }}$ of original value when it passes a stationary observer. If the speed of sound in air is $350 \mathrm{~m} / \mathrm{s}$ then the speed of engine is

173059 A train is approaching with velocity $25 \mathrm{~m} / \mathrm{s}$ towards a pedestrian standing on the track, frequency of horn of train is $1 \mathrm{kHz}$. Frequency heard by the pedestrian is $(\mathrm{v}=350 \mathrm{~m} / \mathrm{s})$