Home
Class 12
PHYSICS
A road runs midway between two parallel ...

A road runs midway between two parallel rows of buildings. A motorist moving with a speed of 36 Km/h sounds the horn. He hears the echo one second after he has sounded the horn: Then the distance between the two rows of buildings is. (Velocity of sound in air is 330 m/s)

Text Solution

Verified by Experts

`80 sqrt17m`
`485 Hz and 515 Hz`
Promotional Banner

Topper's Solved these Questions

  • WAVE MOTION AND SOUND

    AAKASH SERIES|Exercise PROBLEMS (LEVEL - I)|59 Videos

  • WAVE MOTION

    AAKASH SERIES|Exercise PRACTICE SHEET ADVANCED (INTEGER TYPE QUESTIONS)|10 Videos

  • WAVE OPTICS

    AAKASH SERIES|Exercise PROBLEMS (LEVEL - II)|33 Videos

Similar Questions

Explore conceptually related problems

An observer stands at a certain distance away from a cliff and produces a loud sound. He hears the echo of the sound after 1.8 s. Calculate the distance between the cliff and the observer if the velocity of sound in air is 340ms^(-1) .

A man fires a gun while standing between two parallel hills. If he hears the first echo after 2 s and the second echo 3 s after the first echo, then calculate the distance between the hills the velocity of sound is 330 m/s.

A boy on a hill A fires a gun. Another boy on hill B hears the sound after 4 s. If the speed of sound is 330 m s^(-1) , find the distance between the two hills.

A man standing between two cliffs produces a sound and hears two successive echoes at intervals of 3 s and 4 s respectively. Calculate the distance between the two cliffs. The speed of sound in the air is 330ms^(-1) .

A person standing between two vertical cliffs and 640 m away from the nearest cliff, produces sound. He hears the first echo after 4 s and the second echo 3 s later. Calculate : the distance between the cliffs

A car emitting sound of frequency 500 Hz speeds towards a fixed wall at 4(m)/(s) . An observer in the car hears both the source frequency as well as the frequency of sound reflected from the wall. If he hears 10 beats per second between the two sounds, the velocity of sound in air will be

A person standing between two vertical cliffs produces a sound. Two successive echoes are heard at 4 s and 6 s. Calculate the distance between the cliffs. (Speed of sound in air = 320 m s^(-1) )

A car is moving with a speed of the 72 Kmh^-1 towards a hill. Car blows horn at a distance of 1800 m from the hill. If echo is heard after 10 s.the speed of sound ("in" ms ^-1) is

A car travelling towards a hill at 10 m//s sound its horn which a frequency 500 H_(Z) . This is heard in a second car travelling behind the first car in the same direction with speed 20 m//s . The sound can also be heard in the second car by reflections of sound the hill. The beat frequency heard by the driver of the sound car will be (speed of sound in air = 340 m//s)

AAKASH SERIES-WAVE MOTION AND SOUND-PROBLEMS (LEVEL - II)
  1. Two identical tuning forks vibrating at the same frequency 256 Hz are ...

    Text Solution

    |

  2. Two sound sources are moving in opposite directions with velocities v...

    Text Solution

    |

  3. A 300 Hz source, an observer and wind are moving as shown in the figur...

    Text Solution

    |

  4. A person standing on a road sends a sound signal to the driver of a ca...

    Text Solution

    |

  5. A stationary sound sound 's' of frequency 334 Hz and a stationary ovs...

    Text Solution

    |

  6. Spherical waves are emitted from a 1.0 W source in an isotropic non-ab...

    Text Solution

    |

  7. The intensity of sound from a point source is 1.0 xx 10^-8 Wm^-2, at a...

    Text Solution

    |

  8. Most people interpret a 9.0 dB increase in sound intensity level as a ...

    Text Solution

    |

  9. About how many times more intense will the normal ear perceiver a soun...

    Text Solution

    |

  10. The explosion of a fire cracker in the air at the a heigth of 40 m pro...

    Text Solution

    |

  11. The sound level at a point 5.0 m away from a point source is 40 dB. Wh...

    Text Solution

    |

  12. If the intensity of sound is doubled, by how many decibels does the so...

    Text Solution

    |

  13. Sound with intensity larger than 120 dB appears painful to a person. A...

    Text Solution

    |

  14. Two waves, each having a frequency of 100 Hz and a wavelength of 2.0 c...

    Text Solution

    |

  15. Two waves, each having a frequency of 100 Hz and a wavelength of 2.0 c...

    Text Solution

    |

  16. Two waves, each having a frequency of 100 Hz and a wavelength of 2.0 c...

    Text Solution

    |

  17. Three component sinusoidal waves progressing in the same directions al...

    Text Solution

    |

  18. A soldier walks towards a high wall taking 120 steps per minute. When ...

    Text Solution

    |

  19. A man stands before a large wall at a distance of 50.0m and claps his ...

    Text Solution

    |

  20. A road runs midway between two parallel rows of buildings. A motorist ...

    Text Solution

    |