Question

(d) rubbe
(UJ Water
(c) vacuum
5. The correct statement among the following is/are:
(a) Dogs can hear ultrasonic sound waves.
(b) Sound with frequency less than 20 Hz are known as infrasonic.
(c) In SONAR, ultrasonic waves are used.
(d) All of these
given lis
list:​

Answer 1

Answer:

i dont no the answer sorry