Q.2. What is the range of frequencies associated with
(a) Infrasound?
The infrasonic sounds lie below 20 Hertz frequency which is inaudible for human ears.
CBSE Class 10 Second Board Result 2026 LIVE: Class 10th session 2 scorecard shortly; direct link, pass marks
CBSE issues guidelines on three-language, exempts current Class 10 and eases transition for Classes 7 to 9
CBSE Class 10 Second Board Result 2026 LIVE: Phase 2 marks for over 6 lakh shortly; direct link, DigiLocker
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