172964 A train is approaching towards a platform with a speed of $10 \mathrm{~ms}^{-1}$ while blowing a whistle of frequency $340 \mathrm{~Hz}$. what is the frequency of whistle heard by a stationary observer on the platform? (given, speed of sound $=340 \mathrm{~ms}^{-1}$ )

172965 A whistle of frequency $660 \mathrm{~Hz}$ moves in a circle of radius $1 \mathrm{~m}$ at an angular speed of $10 \mathrm{rad} / \mathrm{s}$. The highest frequency heard by a listener at a long distance and at rest with respect to the center of the circle is (Let speed of sound $=\mathbf{3 4 0}$ $\mathbf{m} / \mathbf{s . )}$

172966 A musician on a moving vehicle plays a tone at $880 \mathrm{~Hz}$ note. When the vehicle was approaching a listener, he receives it as $888 \mathrm{~Hz}$ tone.
The speed of the vehicle is (Assume the velocity of sound is $333 \mathrm{~m} / \mathrm{s}$.)

172967 A drone fitted with siren in flying directly away from the drone operator and towards a distant building at a speed of $15 \mathrm{~m} / \mathrm{s}$. The siren produces sound of frequency $780 \mathrm{~Hz}$. What is the frequency that the operator hears in the echo reflected from the building.
[Speed of sound is $340 \mathrm{~m} / \mathrm{s}$.]

172968 A highway truck has two horns $A$ and $B$. When sounded together, the driver records 50 beats in 10 seconds. With horn $B$ blowing and the truck moving towards a will at a speed of 10 $\mathrm{m} / \mathrm{s}$, the driver noticed a beat frequency of $5 \mathrm{~Hz}$ with the echo. When frequency of $A$ is decreased the beat frequency of $A$ is decreased the beat frequency with two horns sounded together increases. Calculate the frequency of horn A. (Speed of sound in air $=330 \mathrm{~m} / \mathrm{s}$ )

172964 A train is approaching towards a platform with a speed of $10 \mathrm{~ms}^{-1}$ while blowing a whistle of frequency $340 \mathrm{~Hz}$. what is the frequency of whistle heard by a stationary observer on the platform? (given, speed of sound $=340 \mathrm{~ms}^{-1}$ )

172965 A whistle of frequency $660 \mathrm{~Hz}$ moves in a circle of radius $1 \mathrm{~m}$ at an angular speed of $10 \mathrm{rad} / \mathrm{s}$. The highest frequency heard by a listener at a long distance and at rest with respect to the center of the circle is (Let speed of sound $=\mathbf{3 4 0}$ $\mathbf{m} / \mathbf{s . )}$

172966 A musician on a moving vehicle plays a tone at $880 \mathrm{~Hz}$ note. When the vehicle was approaching a listener, he receives it as $888 \mathrm{~Hz}$ tone.
The speed of the vehicle is (Assume the velocity of sound is $333 \mathrm{~m} / \mathrm{s}$.)

172967 A drone fitted with siren in flying directly away from the drone operator and towards a distant building at a speed of $15 \mathrm{~m} / \mathrm{s}$. The siren produces sound of frequency $780 \mathrm{~Hz}$. What is the frequency that the operator hears in the echo reflected from the building.
[Speed of sound is $340 \mathrm{~m} / \mathrm{s}$.]

172968 A highway truck has two horns $A$ and $B$. When sounded together, the driver records 50 beats in 10 seconds. With horn $B$ blowing and the truck moving towards a will at a speed of 10 $\mathrm{m} / \mathrm{s}$, the driver noticed a beat frequency of $5 \mathrm{~Hz}$ with the echo. When frequency of $A$ is decreased the beat frequency of $A$ is decreased the beat frequency with two horns sounded together increases. Calculate the frequency of horn A. (Speed of sound in air $=330 \mathrm{~m} / \mathrm{s}$ )

172964 A train is approaching towards a platform with a speed of $10 \mathrm{~ms}^{-1}$ while blowing a whistle of frequency $340 \mathrm{~Hz}$. what is the frequency of whistle heard by a stationary observer on the platform? (given, speed of sound $=340 \mathrm{~ms}^{-1}$ )

172965 A whistle of frequency $660 \mathrm{~Hz}$ moves in a circle of radius $1 \mathrm{~m}$ at an angular speed of $10 \mathrm{rad} / \mathrm{s}$. The highest frequency heard by a listener at a long distance and at rest with respect to the center of the circle is (Let speed of sound $=\mathbf{3 4 0}$ $\mathbf{m} / \mathbf{s . )}$

172966 A musician on a moving vehicle plays a tone at $880 \mathrm{~Hz}$ note. When the vehicle was approaching a listener, he receives it as $888 \mathrm{~Hz}$ tone.
The speed of the vehicle is (Assume the velocity of sound is $333 \mathrm{~m} / \mathrm{s}$.)

172967 A drone fitted with siren in flying directly away from the drone operator and towards a distant building at a speed of $15 \mathrm{~m} / \mathrm{s}$. The siren produces sound of frequency $780 \mathrm{~Hz}$. What is the frequency that the operator hears in the echo reflected from the building.
[Speed of sound is $340 \mathrm{~m} / \mathrm{s}$.]

172968 A highway truck has two horns $A$ and $B$. When sounded together, the driver records 50 beats in 10 seconds. With horn $B$ blowing and the truck moving towards a will at a speed of 10 $\mathrm{m} / \mathrm{s}$, the driver noticed a beat frequency of $5 \mathrm{~Hz}$ with the echo. When frequency of $A$ is decreased the beat frequency of $A$ is decreased the beat frequency with two horns sounded together increases. Calculate the frequency of horn A. (Speed of sound in air $=330 \mathrm{~m} / \mathrm{s}$ )

172964 A train is approaching towards a platform with a speed of $10 \mathrm{~ms}^{-1}$ while blowing a whistle of frequency $340 \mathrm{~Hz}$. what is the frequency of whistle heard by a stationary observer on the platform? (given, speed of sound $=340 \mathrm{~ms}^{-1}$ )

172965 A whistle of frequency $660 \mathrm{~Hz}$ moves in a circle of radius $1 \mathrm{~m}$ at an angular speed of $10 \mathrm{rad} / \mathrm{s}$. The highest frequency heard by a listener at a long distance and at rest with respect to the center of the circle is (Let speed of sound $=\mathbf{3 4 0}$ $\mathbf{m} / \mathbf{s . )}$

172966 A musician on a moving vehicle plays a tone at $880 \mathrm{~Hz}$ note. When the vehicle was approaching a listener, he receives it as $888 \mathrm{~Hz}$ tone.
The speed of the vehicle is (Assume the velocity of sound is $333 \mathrm{~m} / \mathrm{s}$.)

172967 A drone fitted with siren in flying directly away from the drone operator and towards a distant building at a speed of $15 \mathrm{~m} / \mathrm{s}$. The siren produces sound of frequency $780 \mathrm{~Hz}$. What is the frequency that the operator hears in the echo reflected from the building.
[Speed of sound is $340 \mathrm{~m} / \mathrm{s}$.]

172968 A highway truck has two horns $A$ and $B$. When sounded together, the driver records 50 beats in 10 seconds. With horn $B$ blowing and the truck moving towards a will at a speed of 10 $\mathrm{m} / \mathrm{s}$, the driver noticed a beat frequency of $5 \mathrm{~Hz}$ with the echo. When frequency of $A$ is decreased the beat frequency of $A$ is decreased the beat frequency with two horns sounded together increases. Calculate the frequency of horn A. (Speed of sound in air $=330 \mathrm{~m} / \mathrm{s}$ )

172964 A train is approaching towards a platform with a speed of $10 \mathrm{~ms}^{-1}$ while blowing a whistle of frequency $340 \mathrm{~Hz}$. what is the frequency of whistle heard by a stationary observer on the platform? (given, speed of sound $=340 \mathrm{~ms}^{-1}$ )

172965 A whistle of frequency $660 \mathrm{~Hz}$ moves in a circle of radius $1 \mathrm{~m}$ at an angular speed of $10 \mathrm{rad} / \mathrm{s}$. The highest frequency heard by a listener at a long distance and at rest with respect to the center of the circle is (Let speed of sound $=\mathbf{3 4 0}$ $\mathbf{m} / \mathbf{s . )}$

172966 A musician on a moving vehicle plays a tone at $880 \mathrm{~Hz}$ note. When the vehicle was approaching a listener, he receives it as $888 \mathrm{~Hz}$ tone.
The speed of the vehicle is (Assume the velocity of sound is $333 \mathrm{~m} / \mathrm{s}$.)

172967 A drone fitted with siren in flying directly away from the drone operator and towards a distant building at a speed of $15 \mathrm{~m} / \mathrm{s}$. The siren produces sound of frequency $780 \mathrm{~Hz}$. What is the frequency that the operator hears in the echo reflected from the building.
[Speed of sound is $340 \mathrm{~m} / \mathrm{s}$.]

172968 A highway truck has two horns $A$ and $B$. When sounded together, the driver records 50 beats in 10 seconds. With horn $B$ blowing and the truck moving towards a will at a speed of 10 $\mathrm{m} / \mathrm{s}$, the driver noticed a beat frequency of $5 \mathrm{~Hz}$ with the echo. When frequency of $A$ is decreased the beat frequency of $A$ is decreased the beat frequency with two horns sounded together increases. Calculate the frequency of horn A. (Speed of sound in air $=330 \mathrm{~m} / \mathrm{s}$ )