Question

19.
What is meant by frequency of sound
waves?
(ii) Give the range of frequencies of sound
waves that an average human ear can
detect.
(ii) A source of wave produces 20 crests and
20 troughs in 0.2 s. The distance between
a crest and next trough is 50 cm. Find the it's wavelength​

Answer 1

Answer:

this is long answer OK for

Answer 2

Answer:

What is meant by frequency of sound

waves?

(ii) Give the range of frequencies of sound

waves that an average human ear can

detect.

(ii) A source of wave produces 20 crests and

20 troughs in 0.2 s. The distance between

a crest and next trough is

Explanation:

50 cm. Find the it's wavelength