Question

3) Applications of ultrasonic sound -
a) They are used in SONAR
b) They are used to study growth of foetus in uterus of a women.
c) They are used to locate cracks/defects in heavy metallic structures.
d) All the above​

Answer 1

Answer:

d) All the above

Explanation:

Hope it helps.

Answer 2

Answer:

d) All of the above

Explanation:

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