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MCQClass 9 / Science / Easy / Level 14
QUESTION
Infrasound का frequency range कैसा होता है?
What is the frequency range of infrasound?
CORRECT ANSWER
A
20 Hz से कम / Less than 20 Hz
EXPLANATION INSIDE
Step 1: concept पहचानें: यह sound frequency classification है। Step 2: 20 Hz से कम frequency वाली sound infrasound कहलाती है। Step 3: Infra means below hearing range य...