1. Wave speed = frequency x wavelength
= 100 x 0.3
= 30 m/s.
2. Wave speed = frequency x wavelength
= 50 x 0.1
= 5 m/s
3. To solve this problem, we have to use the equation that is given: ν=λf
Given, v= 20 m/s, λ = 0.5
so, v= 40 Hz
4. To solve this problem, we have to use the equation that is given: ν=λf
Given, v= 80 m/s, λ = .0.2m
so, v= 400 Hz
5. To solve this problem, we have to use the equation that is given: ν=λf
Given, v= 120 m/s, λ = .0.4m
so, v= 300 Hz
6. To solve this problem, we have to use the wave equation that is given: ν=fλ
v =velocity
f = frequency
λ = wavelength
So we plug in the numbers 340/440= 0.7727272727272727 so round to 0.773
The sound wave has a wavelength of 0.773m.
7. To solve this problem, we have to use the wave equation that is given: ν=fλ
v =velocity
f = frequency
λ = wavelength
So we plug in the numbers 340/880 = 0.3863636363636364 so round to 0.386
The sound wave has a wavelength of 0.386m.
8. To solve this problem, we have to use the wave equation that is given: ν=fλ
v =velocity
f = frequency
λ = wavelength
So we plug in the numbers 400/250 = 1.6
The sound wave has a wavelength of 1.6m
9. 50Hz x 2m = 100m
10. 100Hz x 0.5m = 50m