1) What is sound? a) Energy b) Moment c) Speed 2) How string instruments work? a) on banging b) Plucking of string c) Air 3) High is amplitude-------------- sound a) soft b) Loud 4) High pitch sound will have ------------- oscillation. a) more b) less 5) Effects of noise pollution a) Headache b) Deafness c) High blood presuure d) All of the above

Classifica

Stile di visualizzazione

Opzioni

Cambia modello

Ripristinare il titolo salvato automaticamente: ?