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Andrew [12]
2 years ago
14

The frequency of a wavelength ?

Physics
1 answer:
serious [3.7K]2 years ago
6 0

Answer:

f=0.1

Explanation:

Use the equation:

f=\frac{1}{T} (where T is the period)

f=\frac{1}{9} (9 comes from the period of a full wavelength)

f=0.1

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Given,

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From the continuity equation,

\begin{gathered} A_1v_1=A_2v_2 \\ \pi(\frac{d_1}{2})^2v_1=\pi(\frac{d_2}{2})^2v_2 \\ \Rightarrow d^2_1v_1=d^2_2v_2 \end{gathered}

Where A₁ is the area of the cross-section at the initial position, A₂ is the area of the cross-section of the pipe at a later position, and v₂ is the flow rate of the water at the later position.

On substituting the known values,

\begin{gathered} 0.045^2\times12.5=0.065^2\times v_2 \\ \Rightarrow v_2=\frac{0.045^2\times12.5}{0.065^2} \\ =5.99\text{ m/s} \end{gathered}

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