1.

Complete the following sentences : (a) An average person can hear sound of frequencies in the range ___ to ___. (b) Ultrasound is of frequency ___ . (c) Infrasonic sound is of frequency ___ . (d) Bats can produce and hear ___ sound. (e) Elephants produce ___ sound.

Answer»

Complete the following sentences :

(a) An average person can hear sound of frequencies in the range ___ to ___.

(b) Ultrasound is of frequency ___ .

(c) Infrasonic sound is of frequency ___ .

(d) Bats can produce and hear ___ sound.

(e) Elephants produce ___ sound.



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