Question

At a particular temperature the speed of sound is 330 m/s and its frequency is 990 Hz. Choose the correct period of the wave in fractional form.

Answer 1

1/990 s

Step-by-step explanation:

Answer 2

The correct answer of the question is : 0.001 s.

CALCULATION:

As per the question, the speed of sound v = 330 m/s

The frequency of the sound f = 990 Hz.

Let the wavelength of the wave is
`\lambda`.

The wavelength of the wave is calculated as-

wavelength
`\lambda=(speed)/(frequency)`

=
`(330)/(990)\ m`

= 0.33 m.

Now we are asked to calculate the time period.

The time period of the wave is reciprocal of frequency.

Mathematically time period T =
`(1)/(f)`

=
`(1)/(990)\ s`

= 0.001 s.

As per the question, we need the period.

Hence, the period of the wave is 0.001 s.