Question

the length of air column at which the first resonance was observed when a vibrating fork was placed on a resonance tube was 30cm. Calculate the wavelength of air column and frequency of the fork speed of sound 330m/s​​

Answer 1

• Velocity=330m/s=v
• Length=l=30cm=0.3m

$\boxed{\sf Wavelength=\lambda=4\ell}$

$\\ \sf\longmapsto \lambda=4(0.3)$

$\\ \sf\longmapsto \lambda=1.2m$

Now

$\boxed{\sf Frequency=\nu =\dfrac{v}{\lambda}}$

$\\ \sf\longmapsto \nu=\dfrac{330m/s}{1.2m}$

$\\ \sf\longmapsto \nu=275s^{-1}$

Answer 2

Answer:

Velocity=330m/s=v

Length=l=30cm=0.3m

Wavelength=λ=4ℓ

⟼λ=4(0.3)

⟼λ=1.2m

Now

Frequency= ν= λ/v

⟼ν= 1.2m/330m/s

⟼ν=275s^-1

hope it's help you...!!!!

#rishu