Question

waves of higher frequencies are used to measure depth of the sea (a) name these waves (b) give the frequency of these waves (c) give one more use of these waves

Answer 1

a) Ultrasonic waves
b) above 20000
c) They are used in industries to detect flaws in those materials in which other machines can't see.

Answer 2

(a). ultrasonic wave

(b) more than 20000 hertz

(c) they r used by bats which helps them to catch their preys

pls mark brainliest