173107 With what velocity should an observer approach stationary sound source so that the apparent frequency of sound appear to be double of the initial frequency?
(given velocity of sound $=v$ )

173108 An object producing a pitch of $400 \mathrm{~Hz}$ flies past a stationary person. The object was moving in a straight line with a velocity $200 \mathrm{~m} / \mathrm{s}$. The velocity of sound is $300 \mathrm{~m} / \mathrm{s}$. What is the change in frequency noted by the person as the object flies past him?

173109 The frequency of a radar is $780 \mathrm{MHz}$. The frequency of reflected wave from aeroplane is increased by $2.6 \mathrm{kHz}$. Velocity of the aeroplane is

173110 A whistle of frequency $540 \mathrm{~Hz}$ rotates in a horizontal circle of radius $2 \mathrm{~m}$ at an angular speed of $15 \mathrm{rad} / \mathrm{s}$. The highest frequency heard by a listener at rest with respect to the centre of circle (velocity of sound in air $=330 \mathrm{~ms}^{-1}$ )

173107 With what velocity should an observer approach stationary sound source so that the apparent frequency of sound appear to be double of the initial frequency?
(given velocity of sound $=v$ )

173108 An object producing a pitch of $400 \mathrm{~Hz}$ flies past a stationary person. The object was moving in a straight line with a velocity $200 \mathrm{~m} / \mathrm{s}$. The velocity of sound is $300 \mathrm{~m} / \mathrm{s}$. What is the change in frequency noted by the person as the object flies past him?

173109 The frequency of a radar is $780 \mathrm{MHz}$. The frequency of reflected wave from aeroplane is increased by $2.6 \mathrm{kHz}$. Velocity of the aeroplane is

173110 A whistle of frequency $540 \mathrm{~Hz}$ rotates in a horizontal circle of radius $2 \mathrm{~m}$ at an angular speed of $15 \mathrm{rad} / \mathrm{s}$. The highest frequency heard by a listener at rest with respect to the centre of circle (velocity of sound in air $=330 \mathrm{~ms}^{-1}$ )

173107 With what velocity should an observer approach stationary sound source so that the apparent frequency of sound appear to be double of the initial frequency?
(given velocity of sound $=v$ )

173108 An object producing a pitch of $400 \mathrm{~Hz}$ flies past a stationary person. The object was moving in a straight line with a velocity $200 \mathrm{~m} / \mathrm{s}$. The velocity of sound is $300 \mathrm{~m} / \mathrm{s}$. What is the change in frequency noted by the person as the object flies past him?

173109 The frequency of a radar is $780 \mathrm{MHz}$. The frequency of reflected wave from aeroplane is increased by $2.6 \mathrm{kHz}$. Velocity of the aeroplane is

173110 A whistle of frequency $540 \mathrm{~Hz}$ rotates in a horizontal circle of radius $2 \mathrm{~m}$ at an angular speed of $15 \mathrm{rad} / \mathrm{s}$. The highest frequency heard by a listener at rest with respect to the centre of circle (velocity of sound in air $=330 \mathrm{~ms}^{-1}$ )

173107 With what velocity should an observer approach stationary sound source so that the apparent frequency of sound appear to be double of the initial frequency?
(given velocity of sound $=v$ )

173108 An object producing a pitch of $400 \mathrm{~Hz}$ flies past a stationary person. The object was moving in a straight line with a velocity $200 \mathrm{~m} / \mathrm{s}$. The velocity of sound is $300 \mathrm{~m} / \mathrm{s}$. What is the change in frequency noted by the person as the object flies past him?

173109 The frequency of a radar is $780 \mathrm{MHz}$. The frequency of reflected wave from aeroplane is increased by $2.6 \mathrm{kHz}$. Velocity of the aeroplane is

173110 A whistle of frequency $540 \mathrm{~Hz}$ rotates in a horizontal circle of radius $2 \mathrm{~m}$ at an angular speed of $15 \mathrm{rad} / \mathrm{s}$. The highest frequency heard by a listener at rest with respect to the centre of circle (velocity of sound in air $=330 \mathrm{~ms}^{-1}$ )