Class 7 Science MCQs (Grade 7) From Textbook

Class 7 Science Learning App Free Download | Frequency and Pitch Book PDF

Class 7 Science Exam Prep: Certification Test 1724

Frequency and Pitch Learning App & e-Book: MCQ 1724

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MCQ: 1724

The highest level of frequency which human ear can detect is

  1. 2 Hz
  2. 20 Hz
  3. 20kHz
  4. 2kHz

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Frequency and Pitch Exam Prep: Class 7 Science App & eBook Quiz

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7th Grade Science Quiz App (Android & iOS)

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