(A) Given: Speed of sound in water $(V)$ = $1530 \, m s^{-1}$.Total time taken for the echo to return $(t)$ = $80 \, s$.Let the distance of the obstac

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(A) Given: Speed of sound in water $(V)$ = $1530 \, m s^{-1}$.Total time taken for the echo to return $(t)$ = $80 \, s$.Let the distance of the obstacle from the submarine be $d$.The sound travels to the obstacle and back to the submarine,covering a total distance of $2d$.Using the formula: $2d = V \times t$.Substituting the values: $2d = 1530 \times 80$.$2d = 122400 \, m$.Therefore,$d = 122400 / 2 = 61200 \, m$.

Class 9 Science SOUND Mix Example - SOUND

Medium

In a submarine equipped with sonar,the time between the transmission of ultrasonic signals and the reception of the echo after reflection is found to be $80 \, s$. Find the distance of the obstacle from the submarine,given that the speed of sound in water is $1530 \, m s^{-1}$. (in $, m$)

A
$61200$
B
$30600$
C
$122400$
D
$15300$

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In a submarine equipped with sonar,the time between the transmission of ultrasonic signals and the reception of the echo after reflection is found to be $80 \, s$. Find the distance of the obstacle from the submarine,given that the speed of sound in water is $1530 \, m s^{-1}$. (in $, m$)

Similar Questions

$(a)$ What is the cause of the sensation of sound due to the rolling of thunder?$(b)$ Give the audible range of the human ear.$(c)$ What are infrasonic and ultrasonic waves?

$A$ hospital uses an ultrasonic scanner to locate tumours in a tissue. What is the wavelength of sound in a tissue in which the speed of sound is $1.7 \, km \, s^{-1}$? The operating frequency of the scanner is $4.2 \, MHz$ $(1 \, MHz = 10^{6} \, Hz)$.

Define frequency,amplitude,and speed of a sound wave.

$(i)$ How do bats make use of ultrasonic waves to catch their prey? Explain.$(ii)$ $A$ radar signal is reflected by an aeroplane and is received $2 \times 10^{-5} \text{ s}$ after it was sent. If the speed of these waves is $3 \times 10^{8} \text{ m s}^{-1}$,how far is the aeroplane?

State whether the following statement is true or false: The velocity of sound in air is higher for higher frequencies than for lower frequencies.

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$(a)$ What is the cause of the sensation of sound due to the rolling of thunder?
$(b)$ Give the audible range of the human ear.
$(c)$ What are infrasonic and ultrasonic waves?

$(i)$ How do bats make use of ultrasonic waves to catch their prey? Explain.
$(ii)$ $A$ radar signal is reflected by an aeroplane and is received $2 \times 10^{-5} \text{ s}$ after it was sent. If the speed of these waves is $3 \times 10^{8} \text{ m s}^{-1}$,how far is the aeroplane?