Civil Services HPPSC (Himachal Pradesh) HPAS Mock Test 2021 Physics Waves Intensity and Sound Level

डेसिबल में एक सामान्य बातचीत की तीव्रता किसके बीच होती है?

1
30 - 35
2
60 - 80
3
35 - 60
4
70 - 80
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