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प्रश्न
A sonar station picks up a return signal after 3 seconds. How far away is the object ? (Speed of sound in water = 1440 m/s).
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उत्तर
We have to calculate the depth using a sonar signal.
Given: Time taken to listen to the return signal t = 3 s
So time taken to reach the depth `(t_D) = 3/2` s
Speed of sound in water ν = 1,440 m/s
So the depth can be calculated as
= ν × tD
= 1440 × 1.5 m
= 2160 m
संबंधित प्रश्न
Name the three characteristics of sound.
Name the unit used to measure the loudness of sound. Also write its symbol.
Write the full name of 'SONAR'.
Fill in the blank with suitable word :
Quality of sound depends on ........................
Explain the term 'pitch' of a sound. On what factor does the 'pitch' of a sound depend ?
Draw labelled diagrams to represent sound of (a) low pitch, and (b) high pitch, of the same loudness.
Explain how, bats use ultrasound to catch the prey.
Write any three applications (or uses) of ultrasound.
In SONAR we use:
Fill in the blank and explain.
To discover a sunken ship or objects deep inside the sea, ______ technology is used.
