Home
Class 11
PHYSICS
A whistle giving out 450 H(Z) approaches...

A whistle giving out `450 H_(Z)` approaches a stationary observer at a speed of `33 m//s`. The frequency heard the observer (in `H_(Z)`) is (speed of sound `= 330 m//s`)

A

409

B

429

C

517

D

500

Text Solution

Verified by Experts

The correct Answer is:
D
`f' = f[(v)/(v -v_(s))] =450[(330)/(330-33)]=500 Hz`.
Promotional Banner

Topper's Solved these Questions

  • ARCHIVES 2 VOLUME 6

    CENGAGE PHYSICS ENGLISH|Exercise Multiple Correct|22 Videos

  • ARCHIVES 2 VOLUME 6

    CENGAGE PHYSICS ENGLISH|Exercise Comprehension|12 Videos

  • ARCHIVES 2 VOLUME 6

    CENGAGE PHYSICS ENGLISH|Exercise True/False|4 Videos

  • ARCHIVES 1 VOLUME 6

    CENGAGE PHYSICS ENGLISH|Exercise Integer|4 Videos

  • BASIC MATHEMATICS

    CENGAGE PHYSICS ENGLISH|Exercise Exercise 2.6|20 Videos

Similar Questions

Explore conceptually related problems

A train moves towards a stationary observer with speed 34 m/s. The train sounds a whistle and its frequency registered by the observer is f_(1) . If the speed of train is reduced to 17 m/s, the frequency registered is f_(2) . If speed fo sound is 340 m/s, then the ratio f_(1)//f_(2) is :

a bus is moving towards and stationary observer with speed 20 m/s blows a horn of frequency 200 Hz. the frequency of sound heard by the observer is approximately ( take speed of sound 320 m/s)

A train moves towards a stationary observer with speed 34 m//s . The train sounds a whistle and its frequency registered by the observer is f_(1) . If the train's speed is reduced to 17 m//s , the frequency registered is f_(2) . If the speed of sound of 340 m//s , then the ratio f_(1)//f_(2) is

A train moves towards a stationary observer with speed 34 m//s . The train sounds a whistle and its frequency registered by the observer is f_(1) . If the train's speed is reduced to 17 m//s , the frequency registered is f_(2) . If the speed of sound of 340 m//s , then the ratio f_(1)//f_(2) is

A car has two horns having a difference in frequency of 180 Hz. The car is approaching a stationary observer with a speed of 60 ms^(-1) . Calculate the difference in frequencies of the notes as heard by the observer, If velocity of sound in air is 330 ms^(-1) .

A car sounding a horn producing a note of 500 Hz., approaches and then passes a stationary observer at a steady speed of 15ms^(-1)? . Calculate the change in pitch of the note heard by the observer. (Velocity of sound = 340 ms^(-1)) .

One train is approaching an observer at rest and another train is receding from him with the same velocity 4 m//s . Both trains blow whistles of same frequency of 243 H_(Z) . The beat frequency in H_(Z) as heard by observer is (speed of sound in air = 320 m//s )

The ptich of the whistle of an engine appears to rise to 1,2 times the original value when it approaches a stationary observer. Calculate the speed of the engine if the speed of sound in air is 330 m/s. v'=((V)/(V-V_(S)))v

A whistle giving 700 Hz moves away from a stationary observer towards a wall with a velocity of 2 m/s. How many beats per second are heard by the observer ? [Velocity of sound = 348m/s]

At t=0 , observer and source are at same place. Now the source is projected with velocity 60 sqrt2 m/s at 45 ^(@) . Natural frequency of source is 1000 Hz.find the frequency heard by the observer at t=2s. Take speed of sound = 340 m/s

CENGAGE PHYSICS ENGLISH-ARCHIVES 2 VOLUME 6-Single Correct
  1. The tension in a string, obeying Hooke's law, is x. The speed of sound...

    Text Solution

    |

  2. An open pie is suddenly closed at one end with the result that the fre...

    Text Solution

    |

  3. A whistle giving out 450 H(Z) approaches a stationary observer at a sp...

    Text Solution

    |

  4. A travelling wave in a stretched string is described by the equation y...

    Text Solution

    |

  5. A string of length 0.4 m and mass 10 ^(-2) kg is tightly clamped at it...

    Text Solution

    |

  6. A particle of mass m is executing oscillation about the origin on X- a...

    Text Solution

    |

  7. A particle free to move along the (x - axis) has potential energy give...

    Text Solution

    |

  8. The ratio of the speed of sound in nitrogen gas to that in helium gas,...

    Text Solution

    |

  9. The period of oscillation of a simple pendulum of length (L) suspended...

    Text Solution

    |

  10. A train moves towards a stationary observer with speed 34 m//s. The tr...

    Text Solution

    |

  11. Two vibrating strings of the same material but lengths L and 2L have r...

    Text Solution

    |

  12. Two pulses in a stretched string whose centres are initially 8 cm apar...

    Text Solution

    |

  13. The ends of a stretched wire of length L are fixed at x = 0 and x = L,...

    Text Solution

    |

  14. A particle executes S.H.M. between x = -A and x = + A. The time taken ...

    Text Solution

    |

  15. A simple pendulum has a time period T(1) when on the earth's surface a...

    Text Solution

    |

  16. A simple pendulum is oscillating without damping. When the displacemen...

    Text Solution

    |

  17. A siren placed at a railway platfrom is emitted sound of frequency 5 k...

    Text Solution

    |

  18. A somoneter wire resonates with a given tuning fork forming standing w...

    Text Solution

    |

  19. A police car moving at 22(m)/(s) chases a motorcyclist. The police man...

    Text Solution

    |

  20. In the experiment for the determination of the speed of sound in air u...

    Text Solution

    |