Home
Class 11
PHYSICS
In sport meet the timing of a 200 m stra...

In sport meet the timing of a 200 m straight dash is recorded at the finish point by starting an accurate stop watch on hearing the sound of starting gun firen at the starting poing. The time recorded will be more accurate

A

In winter

B

in summer

C

in all seasons

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
Time recorded in summer is more accurate. The velocity of sound is directly proportional to the squre root of absolute temperature. Hence, the sound of the gun fired at the starting point will reach the finishing point quicker in summer than in winter. The lapse of time due to the time taken by the sound in reaching the finish point will be less in summer and hence the time recorded will be more accurate in summer than in winter.
Promotional Banner

Topper's Solved these Questions

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS ENGLISH|Exercise Multiple Correct|44 Videos

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS ENGLISH|Exercise Assertion-Reasoning|24 Videos

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS ENGLISH|Exercise Subjective|56 Videos

  • RIGID BODY DYNAMICS 2

    CENGAGE PHYSICS ENGLISH|Exercise Interger|2 Videos

  • SUPERPOSITION AND STANDING WAVES

    CENGAGE PHYSICS ENGLISH|Exercise Comprehension Type|5 Videos

Similar Questions

Explore conceptually related problems

The fig. shows the v-t graph of a particle moving in straight line. Find the time when particle returns to the starting point.

The area of a square field is 60025 m^2dot A man cycles along its boundary at 18 km/ hr. In how must time will he return at the starting point ?

A sound source S, emitting a sound of frequency 400 Hz and a receiver R of mass m are at the same point. R is performing SHM with the help of a spring of force constant K. At a time t = 0, R is at the mean position and moving towards the right, as shown. At the same time, the source starts moving away from R with some acceleration a. The frequency registered by the receiver at a time t = 10 s is 250 Hz. What is the time (in seconds) at which the corresponding registered frequency of 250 Hz was emitted by the source? [Given that (m)/(K)=(25)/(pi^(2)) and amplitude of oscillation = (100)/(pi) m, V_("sound") = 320 m s^(-1)]

In a potato race 20 potatoes are placed in a line at intervals of 4m e t e r s with first potato 24m e t r e s from the starting point. A constant is required to bring the potatoes back to the starting place one at a time. How far would he run in bringing back all the potatoes?

In a potato race 20 potatoes are placed in a line at intervals of 4m e t e r s with first potato 24m e t r e s from the starting point. A contestant is required to bring the potatoes back to the starting place one at a time. How far would he run in bringing back all the potatoes?

A particle is constrained to move on a straight line path. It returns to the starting point after 10 sec . The total distance covered by the particle during this time is 30 m . Which of the following statements about the motion of the particle is false

A student performs an experiment for determination of g [ = ( 4 pi^(2) L)/(T^(2)) ] , L ~~ 1m , and he commits an error of Delta L . For T he takes the time of n oscillations with the stop watch of least count Delta T . For which of the following data , the measurement of g will be most accurate ?

Two men P & Q are standing at corners A & B of square ABCD of side 8m. They start moving along the track with constant speed 2 m//s and 10 m//s respectively. Find the time when they will meet for the first time

An object starts from rest from the point A to rest at point B on the same straight line at a distance d. It moves over the first part of the distance with an acceleration alpha m//s^(2) and for the remainder the retardation beta m//s^(2) . Find the time taken to complete the journey.

A motor cycle starts from rest and accelerates along a straight path at 2m//s^(2) . At the starting point of the motor cycle there is a stationary electric siren. How far has the motor cycle gone when the driver hears the frequency of the siren at 94% of its value when the motor cycle was at rest ? (Speed of sound = 330ms^(-2))

CENGAGE PHYSICS ENGLISH-SOUND WAVES AND DOPPLER EFFECT-Single Correct
  1. A wall is moving with velocity u and a source of sound moves with velo...

    Text Solution

    |

  2. For a sound wave travelling towards +x direction, sinusoidal longitudi...

    Text Solution

    |

  3. If the source is moving towards right, wavefront of sound waves get mo...

    Text Solution

    |

  4. Consider a source of sound S and an observer P. The sound source is of...

    Text Solution

    |

  5. When source and detector are stationary but the wind is blowing at spe...

    Text Solution

    |

  6. Figure. Represents the displacement y versus distance x along the dire...

    Text Solution

    |

  7. The driver of a car approaching a vertical wall notices that the frequ...

    Text Solution

    |

  8. The difference between the apparent frequency of a source of sound as ...

    Text Solution

    |

  9. The freqency of a radar is 780 M hz. The frequency of the reflected wa...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  12. A person speaking normally produces a sound of intensity 40 dB at a di...

    Text Solution

    |

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

    Text Solution

    |

  14. In sport meet the timing of a 200 m straight dash is recorded at the f...

    Text Solution

    |

  15. When a source moves away from a stationary observer, the frequency is ...

    Text Solution

    |

  16. Length of a string of density rho and Young's modulus Y under tension ...

    Text Solution

    |

  17. Source and observer start moving simulatneously along x and y-axis res...

    Text Solution

    |

  18. A statinary observer receives a sound of frequency 2000 Hz. The variat...

    Text Solution

    |

  19. A source of sound of frequency f1 is placed on the ground. A detector ...

    Text Solution

    |

  20. A sound wave of frequency f travels horizontally to the right . It is ...

    Text Solution

    |