A sound wave in a fluid medium is reflected at a barrier so that a standing wave is formed. The distance between nodes is 4.9 cm, and the speed of propagation is 1250 m/s. Find the frequency of the sound wave.

Explanation

To find the frequency of the sound wave, we can follow these steps:

### Step 1: Understand the relationship between nodes and wavelength
In a standing wave, the distance between two consecutive nodes is equal to half the wavelength (λ/2). Given that the distance between nodes is 4.9 cm, we can express this relationship mathematically:
\[ \frac{\lambda}{2} = 4.9 \text{ cm} \]

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