MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Characteristics of Sound Waves

A locomotive ...

Question

A locomotive approaching a crossing at a speed of 20m/s sounds a whistle of frequency 640Hz when 1km from the crossing. There is no wind and the speed of sound in air is 330m/s. What frequency is heard by an observer √3km on the straight road from the crossing at right angle. A locomotive approaching a crossing at a speed of 20m/s sounds a whistle of frequency 640Hz when 1km from the crossing. There is no wind and the speed of sound in air is 330m/s. What frequency is heard by an observer √3km on the straight road from the crossing at right angle.

Open in App

Solution

Suggest Corrections

thumbs-up

36

Similar questions

Q. A car approaching a crossing at a speed of 20 m/s sounds a horn of frequency 628 Hz when 80m from the crossing. The apparent frequency heard by an observer 60m from the crossing on the straight road which crosses the road at right angles is (velocity of sound = 330 m/s)

Q. A car approaching a crossing at a speed of

20 m / s

sounds a horn of frequency

500 H z

80 m

from the crossing. Speed of sound in air is

330 m / s .

What frequency is heard by an observer

60 m

from the crossing on the straight road which crosses car road at right angles?

Q. A train approaching a railway crossing at a speed of

180 k m h^{- 1}

sounds a short whistle at a frequency

600 H z

400 m

away from the crossing. The speed of sound in air is

340 {m s}^{- 1}

. The frequency of the sound heard by a person standing on a road perpendicular to the track at a distance of

300 m

from the crossing is:

Q. A car approaching a crossing at a speed of

50 m/s

blows a horn of frequency

500 Hz

30 m

away from the crossing. The speed of sound in air is

330 m/s

. What frequency will be heard by an observer at rest at

40 m

from the crossing?

Q. A train approaching a railway crossing at a speed of

120 {kmh}^{- 1}

sounds a short whistle at frequency

640 Hz

300 m

away from the crossing. The speed of sound in air is

340 {ms}^{- 1}

. What will be frequency heard by a person standing on a road perpendicular to the track through the crossing at a distance of

400 m

from the crossing ?

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Characteristics of Sound

PHYSICS

Watch in App

explore_more_icon

Explore more

Characteristics of Sound Waves

Standard IX Physics

Join BYJU'S Learning Program

CrossIcon