Flash Education

Question

A boy fires a gun and another boy at a distance hears the sound of fire 2.5 s after seeing the flash. If speed of sound in air is 340 m s-1 , find the distance between the boys.

Category: Propagation of Sound Waves Class 9 ICSE

March 28, 2024

Answer

Time (t)= 2.5 s

Speed of sound (V) = 340 m s^-1

Distance (d) = ?

V = $Distance\over Time$

Substituting the values, we get,

340 = $d\over 2.5$

⇒ d = 340 × 2.5 = 850 m

Therefore, the distance between the boys = 850 m.

Was this answer helpful?

Didn't liked the above answer ?

Text Generation Tool

💡 Some Related Questions

Propagation of Sound Waves

Explain how do bats locate the obstacles and prey in their way.

Propagation of Sound Waves

Differentiate between infrasonic, sonic, ultrasonic and supersonic sounds.

Propagation of Sound Waves

State two applications of ultrasound.

Propagation of Sound Waves

State two properties of ultrasound that make it useful to us.

Propagation of Sound Waves

Can you hear the sound produced due to vibrations of a seconds’ pendulum? Give reason.

Propagation of Sound Waves

State the approximate speed of ultrasound in air.

Propagation of Sound Waves

What is ultrasound?

Propagation of Sound Waves

Name the sounds of the frequencies given below —(a) 10 Hz (b) 100 Hz (c) 1000 Hz (d) 40 kHz

Propagation of Sound Waves

Complete the following sentences —(a) An average person can hear sounds of frequencies in the range ………. to ……….(b) Ultrasound is of frequency ……….(c) Infrasonic sound is of frequency ……….(d) Bats can produce and hear ………. sound.(e) Elephants produce ………. sound.

Propagation of Sound Waves

Which has a higher frequency — ultrasonic sound or infrasonic sound?

error: Content is protected !! 💀