A sound has a frequency of 50 Hz and a wavelength of 10 m. What is the speed of the sound?
Given, n = 50 Hz, λ = 10m
v = nλ
v = 50 × 10
v = 500 ms-1
A sound has a frequency of 5 Hz and a speed of 25 ms-1. What is the wavelength of the sound?
Given, n = 5 Hz, v = 25 ms-1
v = nλ
λ = v/n = 25/5 = 5 m
1. Ruthvik and Ruha hear a gunshot 2 second after it is fired. How far away from the gun they are standing? (Speed of sound in air is equal to 330ms-1)
Given data : time t = 2 s
Speed of sound V = 330 ms-1
To find : Distance d = ?
Formula : Distance = Speed × time
Distance d = 330 × 2 = 660 m
2. A sound wave travels 2000 m in 8 s. What is the velocity of the sound?
Given data :
Distance travelled by a sound wave d = 2000 m
time taken t = 8 s
To find : Velocity of sound V = ?
Volcity V = distance (d) / time(I)
V= 2000/8 = 250ms-1
3. A wave with a frequency of 500 Hz is traveling at a speed of 200 ms-1. What is the wavelength?
Given data : Frequency n = 500 Hz
Speed V = 200 ms-1
To find : Wavelength λ = ?
Formula : Wavelength λ = Velocity (V) / Wavelength (n)
λ = 200/500 = 2/5= 0.4 m
4. What is the frequency of a mechanical wave that has a velocity of 25 ms 1 and a wavelength of 12.5 m?
Given data : Frequency n = ?
Velocity V = 25 ms-1
Wavelength λ = 12.5m
To find: Frequency n = ?
Formuls: Frequency n = V(Velocity) / λ(Wavelength)
n = 25/12.5 = 2 Hz