Home
Class 11
PHYSICS
A gun is fired from a place which is at ...

A gun is fired from a place which is at distance 1.2 km from a hill. The echo of the sound s heard back at the same place of firing after 8 second. Find the speed of sound.

Text Solution

Verified by Experts

The echo will be heard when the sound reaches back at the place of firing. So, the total distance travelled by sound is `2xx1.2km=2.4km=2400m`
speed `=(2400m)/(8s)=300ms^(-1)`
Promotional Banner

Topper's Solved these Questions

  • KINEMATICS

    FULL MARKS|Exercise TEXTUAL QUESTIONS SOLVED (MULTIPLE CHOICE QUESTIONS:)|30 Videos

  • KINEMATICS

    FULL MARKS|Exercise TEXTUAL QUESTIONS SOLVED (SHORT ANSWER QUESTIONS)|30 Videos

  • HEAT AND THERMODYNAMICS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED (Numerical Problems)|16 Videos

  • KINETIC THEORY OF GASES

    FULL MARKS|Exercise Addtional Numerical Problems|10 Videos

Similar Questions

Explore conceptually related problems

A source emitting sound of frequency 180 Hz is placed in front of a wall at a distance of 2 m from it. A detector is also placed in front of the wall at the same distance from it. Find the minimum distance between the source and the detector for which the detector detects a maximum of sound. Speed of sound in air =360ms^-1 .

A siren is fitted on as car going towards a vertical wall at a speed of 36 km/h. A person standing on the ground, behind the car, listens to the siren sound coming directly from the source as well as that coming after refelction from the siren to the person and b. coming after reflection. Take the speed of sound to be 340ms^-1

A sound of frequency 1500 Hz is emitted by a source which moves away from an observer and moves towards a cliff at a speed of 6 ms^(-1) (a) Calculate the frequency of the sound which is coming directly from the source. (b) Compute the frequency ofsound heard by the observer reflected off the cliff. Assume the speed of sound in air is 330 ms^(-1)

A 50 g bullet is fired from a 10 kg gun with a speed of 500 ms^(-1) . What is the speed of the recoil of the gun?

Two electric trains run at the same speed of 72 km h^-1 along the same track and in the same direction with a separation of 2.4 km between them. The two trains simultaneously sound brief whistles. A person is situated at a perpendicular distance of 500 m from the track and is equidistant from the two trains at the instant of the whistling. If both the whistles were at 500 Hz and the speed of sound in air is 340 m s^-1 , find the frequencies heard by the person.

Suppose a man stands at a distance from a cliff and claps his hands . He receives an echo from the cliff after 4 second . Calculate the distance between the man and the cliff . Assume the speed of sound to be 343 m s^(-1)