FRANK Solutions for Class 9 Physics Chapter 7 - Sound - Range of Hearing
Excel in your studies with the support of Frank Solutions for ICSE Class 9 Physics Chapter 7 Sound – Range of Hearing. These TopperLearning’s revision notes contain model answers for textbook questions that are created by Science experts. Use these solutions to get a better grasp of sound-related concepts such as hertz, frequency, ultrasonic sound, infrasonic sound, and more.
Revise using our Frank textbook solutions for ICSE Class 9 Physics to understand the concept of SONAR better. Make your Physics revision easier with TopperLearning’s other Science e-learning resources created by experts. Our sample papers, videos, online practice tests and more can help you perform well in your academic journey.
Chapter 7 - Sound - Range of Hearing 284
(ii) More than 20KHz - we cannot hear sound.
(i) Ultrasonic sound is used to detect the flaws in metal castings of automobile tyres.
(ii) It is used in hospitals to detect defects in certain parts of body.
(i) It helps animals to communicate with each other. e.g dolphins use the echolocation to communicate with other dolphins.
(ii) It helps in navigation and to locate their prey.
(iii) It is used by them to hunt for the meal.
(ii) 200Hz - audible sound.
(iii) 2000 Hz - Audible sound.
(iv) 45 KHz - Ultrasonic sound
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