मराठी
महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (मराठी सेमी-इंग्रजी) इयत्ता ९ वी

Fill in the blank and explain. To discover a sunken ship or objects deep inside the sea, ______ technology is used.

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प्रश्न

Fill in the blank and explain.

To discover a sunken ship or objects deep inside the sea, ______ technology is used.

रिकाम्या जागा भरा
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उत्तर

To discover a sunken ship or objects deep inside the sea, SONAR technology is used.

Explanation:

The technology of SONAR (Sound navigation and ranging) is used to estimate the distance and location of underwater objects. A transmitter and a detector are fitted in a ship to do this.

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पाठ 12: Study of Sound - Exercise [पृष्ठ १३७]

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बालभारती Science and Technology [English] Standard 9 Maharashtra State
पाठ 12 Study of Sound
Exercise | Q 1. d. | पृष्ठ १३७

संबंधित प्रश्‍न

How is ultrasound used for cleaning?


Explain the working and application of a sonar.


A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.


Explain the term 'amplitude' of a wave. Draw the diagram of a wave and mark its amplitude on it.


A wave is moving in air with a velocity of 340 m/s. Calculate the wavelength if its frequency is 512 vibrations/sec.


Fill in the blank with suitable word .
Sound waves are caused by ...................  


Name the characteristic of sound which depends on (a) amplitude (b) frequency, and (c) waveform.


How is an ultrasound scan for fetus (unborn baby) better than X-ray ?


What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?


Fill in the blank with suitable word : 
 Pitch of sound depends on ....................


Fill in the blank with suitable word : 
Quality of sound depends on ........................


Draw labelled diagrams to represent sound of (a) low pitch, and (b) high pitch, of the same loudness.


What is meant by the quality (or timbre) of sound ? On what factor does the quality (or timbre) of a sound depend ?


How is it  that bats are able to fly at night without colliding with other objects ?


Explain how, flaws (or defects) in a metal block can be detected by using ultrasound.


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).


What type of waves are generated by SONAR device fixed to a fishing ship ?


The depth of an ocean can be determined by ______.


Expand the abbreviation of the term SONAR.


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