Sonar Sound
Sonar Sound
SONAR: The word SONAR stands for Sound Navigation And Ranging. Sonar is an apparatus used to find the depth of a sea or to locate the underwater things like shoals of fish, shipwrecks and enemy submarines. It uses ultrasonic waves to measure the distance, direction and speed of underwater objects. SONAR consists of two parts:
1. a transmitter (for emitting ultrasonic waves)
2. a receiver (for detecting ultrasonic waves)
| The transmitter produces and transmits ultrasonic wave. These waves travel down the sea-water towards the bottom of the sea. When the ultrasonic sound pulse strikes the bottom of the sea, it is reflected back in the form of echo aid are sensed by the detector. The detector converts the ultrasonic waves into electrical signals which are appropriately interpreted. The distance of the object that reflected the sound wave can be calculated by knowing the speed of sound wave in water and the time interval between transmission and reception of the ultrasound. |  |
This will give us the depth of the sea. Let the time interval between transmission and reception of ultrasound signal be ‘t’ and the speed of sound through sea-water be ‘v;. The total distance, 2d travelled by the ultrasound is, then
2d = v x t
This method is called echo-ranging.
SONAR is used determine the depth of the sea and to locate underwater hills, valleys, submarine, ice-bergs, sunken ship, etc.
| |||||||||||||||
| Right Option : A | |||||||||||||||
| View Explanation | |||||||||||||||
A sonar device on a submarine send out a signal and receives an echo 5 seconds later. Calculate the speed of sound in water, if the distance of the object from the submatine is 3625 m. | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct : (a) The word SONAR stands for Sound Navigation And Ranging. (b) Sonar is an apparatus used to find the depth of a sea. (c) SONAR consists of two parts, a transmitter (for emitting ultrasonic waves) and a receiver (for detecting ultrasonic waves). | |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
