Question

The speed of highly penetrating ultrasonic waves is (a) lower than those of audible sound waves
(b) higher than those of audible sound waves
(c) much higher than those of audible sound waves
(d) same as those of audible sound waves

Answer 1

Answer:

(d) same as those of audible sound.

Explanation:

Velocity of any sound in air at room temparture is about 340m/s. It may be audible sound or ultrasound.

Answer 2

same as those of audible sound waves is correct answer.........