Question

Please answer these!

Answer 1

6. f = 128.62
`s^(-1)` , T= 0.0077775 s

7. f = 2.2 *
`10^(4)`
`s^(-1)`, T = 4.545 *
`10^(-5)` s

8. 32.64
`s^(-1)`

9. 3.29 *
`10^(14)`
`s^(-1)`

Step-by-step explanation:

Step 1:

6.

For light and sound v = fλ

where v represents the velocity

f represents the frequency

λ represents the wavelength

λ = 2.69 m

v = 346 m/s

f = v/λ = 346/2.69 = 128.62
`s^(-1)`

Time period is the reciprocal of frequency

T = 1/128.62 = 0.0077775 s

Step 2:

7.

λ = 110 cm = 1.1 m

v = 2.42*
`10^(4)` m/s

f = 2.42*
`10^(4)`/1.1 = 2.2 *
`10^(4)`
`s^(-1)`

T = 1/(2.2*
`10^(4)`) = 4.545 *
`10^(-5)` s

Step 3:

8.

λ = 10.6 m

v = 346 m/s

f = v/λ = 346/10.6 = 32.64
`s^(-1)`

Step 4:

9.

λ = 5.89 *
`10^(-7)` m

v = 1.94 *
`10^(8)` m/s

f = v/λ = 3.29 *
`10^(14)`
`s^(-1)`