Question

A sound has 13 crests and 15 troughs in 3 seconds. When the second crest is produced the first is 2cm away from the source?
Calculate a. The wavelength b. The frequency c. The wave speed

Answer 1

Answer:

A sound has 13 crests and 15 troughs in 3 seconds. When the second crest is produced the first is 2cm away from the source?

Calculate a. The wavelength b. The frequency c. The wave speed

Explanation:

A sound has 13 crests and 15 troughs in 3 seconds. When the second crest is produced the first is 2cm away from the source?

Calculate a. The wavelength b. The frequency c. The wave speed

Answer 2

$\huge\sf\underline\blue{Required \: Answer}$

αnswers:-

Given

Number of crests = 13

Number of trough = 15

Time = 3 seconds

Second crest is produced, the first is 2 cm

away from the source.

To Find:-

a. The wavelength b. The frequency c. The wave

speed

Solution: Time period T = 1 + frequency =

a) wavelength= 2 cm

b) Number of waves produced per second =

15/3 = 5.

So, frequency = 5Hz. =

c) Speed of the wave = frequency × wavelength =

5×2= 10 cm/sec.

Hence, Answer is Given.